Lynn Snyder-Mackler

Summary

Affiliation: University of Delaware
Country: USA

Publications

  1. pmc Knee instability after acute ACL rupture affects movement patterns during the mid-stance phase of gait
    Wendy J Hurd
    Department of Physical Therapy, University of Delaware, 309 McKinly Lab, Newark, Delaware 19716, USA
    J Orthop Res 25:1369-77. 2007
  2. pmc Muscle impairments in patients with knee osteoarthritis
    Ali H Alnahdi
    Graduate Program in Biomechanics and Movement Science, University of Delaware, Newark, Delaware, and King Saud University, Riyadh, Saudi Arabia
    Sports Health 4:284-92. 2012
  3. pmc Management of the athlete with acute anterior cruciate ligament deficiency
    Wendy Hurd
    Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota
    Sports Health 1:39-46. 2009
  4. ncbi request reprint Quadriceps strength and volitional activation before and after total knee arthroplasty for osteoarthritis
    Jennifer E Stevens
    Department of Physical Therapy and Graduate Program in Biomechanics and Movement Sciences, University of Delaware, Newark, DE 19716, USA
    J Orthop Res 21:775-9. 2003
  5. ncbi request reprint Differences in normal and perturbed walking kinematics between male and female athletes
    Wendy J Hurd
    Department of Physical Therapy, University of Delaware, Newark 19716, USA
    Clin Biomech (Bristol, Avon) 19:465-72. 2004
  6. ncbi request reprint Preoperative quadriceps strength predicts functional ability one year after total knee arthroplasty
    Ryan L Mizner
    Department of Physical Therapy, University of Delaware, Newark, 19716, USA
    J Rheumatol 32:1533-9. 2005
  7. pmc Effects of the amount of valgus correction for medial compartment knee osteoarthritis on clinical outcome, knee kinetics and muscle co-contraction after opening wedge high tibial osteotomy
    Kristin Briem
    McKinly Laboratory, University of Delaware, Newark, Delaware 19716, USA
    J Orthop Res 25:311-8. 2007
  8. ncbi request reprint Neuromuscular function after anterior cruciate ligament reconstruction with autologous semitendinosus-gracilis graft
    Glenn N Williams
    Department of Mechanical Engineering Research, Center for Biomedical Engineering Research, University of Delaware, 126 Spencer Laboratory, Newark, DE 19716, USA
    J Electromyogr Kinesiol 15:170-80. 2005
  9. pmc Altered loading in the injured knee after ACL rupture
    Emily S Gardinier
    Biomechanics and Movement Science Program, University of Delaware, Newark, Delaware, USA
    J Orthop Res 31:458-64. 2013
  10. pmc Clinical predictors of elective total joint replacement in persons with end-stage knee osteoarthritis
    Joseph A Zeni
    Department of Physical Therapy, University of Delaware, Newark, DE, USA
    BMC Musculoskelet Disord 11:86. 2010

Research Grants

  1. DYNAMIC STABILITY IN THE ACL INJURED KNEE
    Lynn Snyder Mackler; Fiscal Year: 2001
  2. Dynamic Stability of the ACL Deficient Knee
    Lynn Snyder Mackler; Fiscal Year: 2009
  3. Dynamic Stability of the ACL Deficient Knee
    Lynn Snyder Mackler; Fiscal Year: 2009
  4. Can Neuromuscular Training Alter Movement Patterns?
    Lynn Snyder Mackler; Fiscal Year: 2007
  5. Dynamic Stability of the ACL Deficient Knee
    Lynn Snyder Mackler; Fiscal Year: 2006
  6. Dynamic Stability of the ACL Deficient Knee
    Lynn Snyder Mackler; Fiscal Year: 2010
  7. Motion Analysis System for Study of Human Movement Dysfunction
    Lynn Snyder Mackler; Fiscal Year: 2006
  8. NMES for Older Individuals After Total Knee Arthroplasty
    Lynn Snyder Mackler; Fiscal Year: 2005
  9. NMES for Older Individuals After Total Knee Arthroplasty
    Lynn Snyder Mackler; Fiscal Year: 2002
  10. DYNAMIC STABILITY IN THE ACL INJURED KNEE
    Lynn Snyder Mackler; Fiscal Year: 2002

Detail Information

Publications84

  1. pmc Knee instability after acute ACL rupture affects movement patterns during the mid-stance phase of gait
    Wendy J Hurd
    Department of Physical Therapy, University of Delaware, 309 McKinly Lab, Newark, Delaware 19716, USA
    J Orthop Res 25:1369-77. 2007
    ....
  2. pmc Muscle impairments in patients with knee osteoarthritis
    Ali H Alnahdi
    Graduate Program in Biomechanics and Movement Science, University of Delaware, Newark, Delaware, and King Saud University, Riyadh, Saudi Arabia
    Sports Health 4:284-92. 2012
    ..Understanding the extent of muscle impairments, its relationship with physical function and disease progression, and the evidence behind exercise therapy that targets muscle impairments is crucial...
  3. pmc Management of the athlete with acute anterior cruciate ligament deficiency
    Wendy Hurd
    Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota
    Sports Health 1:39-46. 2009
    ..The University of Delaware has developed and validated a treatment algorithm and screening examination to distinguish between nonoperative and surgical candidates...
  4. ncbi request reprint Quadriceps strength and volitional activation before and after total knee arthroplasty for osteoarthritis
    Jennifer E Stevens
    Department of Physical Therapy and Graduate Program in Biomechanics and Movement Sciences, University of Delaware, Newark, DE 19716, USA
    J Orthop Res 21:775-9. 2003
    ..The purpose of this investigation was to assess contributions of AMI to quadriceps weakness before and after TKA and to assess the effect of pain on AMI...
  5. ncbi request reprint Differences in normal and perturbed walking kinematics between male and female athletes
    Wendy J Hurd
    Department of Physical Therapy, University of Delaware, Newark 19716, USA
    Clin Biomech (Bristol, Avon) 19:465-72. 2004
    ..To identify differences in lower extremity kinematic movement patterns between genders during walking through the application of an expected perturbation...
  6. ncbi request reprint Preoperative quadriceps strength predicts functional ability one year after total knee arthroplasty
    Ryan L Mizner
    Department of Physical Therapy, University of Delaware, Newark, 19716, USA
    J Rheumatol 32:1533-9. 2005
    ..We hypothesized that preoperative quadriceps strength would be the best predictor of postoperative functional ability when compared to preoperative pain or knee range of motion (ROM)...
  7. pmc Effects of the amount of valgus correction for medial compartment knee osteoarthritis on clinical outcome, knee kinetics and muscle co-contraction after opening wedge high tibial osteotomy
    Kristin Briem
    McKinly Laboratory, University of Delaware, Newark, Delaware 19716, USA
    J Orthop Res 25:311-8. 2007
    ..This outcome may contribute to accelerated degeneration of the knee for this group of people...
  8. ncbi request reprint Neuromuscular function after anterior cruciate ligament reconstruction with autologous semitendinosus-gracilis graft
    Glenn N Williams
    Department of Mechanical Engineering Research, Center for Biomedical Engineering Research, University of Delaware, 126 Spencer Laboratory, Newark, DE 19716, USA
    J Electromyogr Kinesiol 15:170-80. 2005
    ..The purpose of this study was to evaluate the effect that anterior cruciate ligament reconstruction with autologous semitendinosus-gracilis graft has on voluntary muscle control by assessing subjects' specificity of muscle action...
  9. pmc Altered loading in the injured knee after ACL rupture
    Emily S Gardinier
    Biomechanics and Movement Science Program, University of Delaware, Newark, Delaware, USA
    J Orthop Res 31:458-64. 2013
    ..Further work is needed to determine whether this early decreased loading of the injured limb is involved in the development of osteoarthritis in these patients...
  10. pmc Clinical predictors of elective total joint replacement in persons with end-stage knee osteoarthritis
    Joseph A Zeni
    Department of Physical Therapy, University of Delaware, Newark, DE, USA
    BMC Musculoskelet Disord 11:86. 2010
    ..The purpose of this study was to determine which clinical factors will predict the decision to undergo TKA in individuals with end-stage knee OA. Knowledge of these factors will aid in clinical decision making for the timing of TKA...
  11. ncbi request reprint Specificity of muscle action after anterior cruciate ligament injury
    Glenn N Williams
    Center for Biomedical Engineering Research, University of Delaware, Newark, DE 19716, USA
    J Orthop Res 21:1131-7. 2003
    ..Increased and more global co-contraction was also observed in the ACL-D limbs. The alterations in muscle firing patterns observed in this study are consistent with diminished neuromuscular control...
  12. pmc Perturbation training prior to ACL reconstruction improves gait asymmetries in non-copers
    Erin Hartigan
    Physical Therapy Department, and Biomechanics and Movement Sciences Program, University of Delaware, 301 McKinly Lab, Newark, Delaware 19716 2591, USA
    J Orthop Res 27:724-9. 2009
    ..Non-copers strength and knee excursions were more symmetrical 6 months postoperatively in the group that received perturbation training and progressive quadriceps strength training than the group who received strength training alone...
  13. ncbi request reprint Do ACL-injured copers exhibit differences in knee kinematics?: An MRI study
    Peter J Barrance
    Center for Biomedical Engineering Research, University of Delaware, Newark, DE, USA
    Clin Orthop Relat Res 454:74-80. 2007
    ..Differences in tibial positioning did not correlate with side-to-side differences in AP laxity in any of the groups, and we identified no changes to tibial axial rotation patterns associated with ACL deficiency...
  14. pmc Effect of anatomic realignment on muscle function during gait in patients with medial compartment knee osteoarthritis
    Dan K Ramsey
    Research University of Delaware, Newark, DE 19716, USA
    Arthritis Rheum 57:389-97. 2007
    ..The purpose of this study was to ascertain whether opening-wedge high-tibial osteotomy (OW-HTO) corrected pathomechanical abnormalities associated with the progression of knee OA...
  15. pmc Pre-operative quadriceps strength predicts IKDC2000 scores 6 months after anterior cruciate ligament reconstruction
    David Logerstedt
    Department of Physical Therapy, University of Delaware, 301 McKinly Lab, Newark, DE 19716, USA
    Knee 20:208-12. 2013
    ..The purpose of this study is to examine the relationship of pre-operative quadriceps strength and post-operative knee function and to investigate how other pre-operative factors may influence this relationship...
  16. pmc Symmetry restoration and functional recovery before and after anterior cruciate ligament reconstruction
    David Logerstedt
    Department of Physical Therapy, University of Delaware, 301 McKinly Lab, Newark, DE 19716, USA
    Knee Surg Sports Traumatol Arthrosc 21:859-68. 2013
    ....
  17. pmc Preoperative predictors for noncopers to pass return to sports criteria after ACL reconstruction
    Erin H Hartigan
    Physical Therapy Department and Biomechanics and Movement Sciences Program, University of Delaware, Newark, DE, USA
    J Appl Biomech 28:366-73. 2012
    ..Further, 63% of those who increased preoperative quadriceps strength passed RTS criteria, whereas 73% who did not failed. Increasing quadriceps strength in noncopers before ACLR seems warranted...
  18. pmc Gait and neuromuscular asymmetries after acute anterior cruciate ligament rupture
    Emily S Gardinier
    Biomechanics and Movement Science Program, University of Delaware, Newark, DE, USA
    Med Sci Sports Exerc 44:1490-6. 2012
    ..The decreased internal knee extensor moment is a significant gait asymmetry among patients with anterior cruciate ligament (ACL) deficiency, yet the muscular strategy driving this altered moment for the injured limb is unclear...
  19. ncbi request reprint Characteristics of human knee muscle coordination during isometric contractions in a standing posture: the effect of limb task
    Toran D MacLeod
    University of Delaware, Delaware Rehabilitation Institute, 126 Spencer, 130 Academy Street, Newark, DE 19711, USA
    J Electromyogr Kinesiol 23:1398-405. 2013
    ..Findings suggest unique neuromuscular control strategies are used for the legs depending on limb task...
  20. pmc Control of frontal plane knee laxity during gait in patients with medial compartment knee osteoarthritis
    Michael D Lewek
    Department of Physical Therapy and Biomechanics and Movement Science Program, University of Delaware, Newark, DE 19716, USA
    Osteoarthritis Cartilage 12:745-51. 2004
    ....
  21. pmc Early postoperative measures predict 1- and 2-year outcomes after unilateral total knee arthroplasty: importance of contralateral limb strength
    Joseph A Zeni
    Department of Physical Therapy, University of Delaware, 301 McKinly Laboratory, Newark, DE 19716, USA
    Phys Ther 90:43-54. 2010
    ..Total knee arthroplasty (TKA) has been shown to be an effective surgical intervention for people with end-stage knee osteoarthritis. However, recovery of function is variable, and not all people have successful outcomes...
  22. ncbi request reprint Quadriceps weakness, atrophy, and activation failure in predicted noncopers after anterior cruciate ligament injury
    Glenn N Williams
    Center for Biomedical Engineering Research, University of Delaware, Newark, DE 19716, USA
    Am J Sports Med 33:402-7. 2005
    ..Both atrophy and activation failure have been demonstrated in this population but have not been directly related to quadriceps weakness...
  23. pmc Time line for noncopers to pass return-to-sports criteria after anterior cruciate ligament reconstruction
    Erin H Hartigan
    Physical Therapy Department, University of Delaware, Newark, DE, USA
    J Orthop Sports Phys Ther 40:141-54. 2010
    ..Randomized clinical trial...
  24. ncbi request reprint Quadriceps femoris muscle morphology and function after ACL injury: a differential response in copers versus non-copers
    Glenn N Williams
    126 Spencer Laboratories, Department of Mechanical Engineering, Center for Biomedical Engineering Research, University of Delaware, Newark, DE 19716 3140, USA
    J Biomech 38:685-93. 2005
    ..In general, the copers' results fell between those of the non-copers and uninjured subjects. The results of this study suggest that quadriceps muscle function is a critical factor in the differential response to ACL injury...
  25. ncbi request reprint Predictability of maximum voluntary isometric knee extension force from submaximal contractions in older adults
    Scott K Stackhouse
    Department of Physical Therapy, 301 McKinly Laboratory, University of Delaware, Newark, Delaware 19716, USA
    Muscle Nerve 27:40-5. 2003
    ..Reexamination of the relationship between the CAR and %MVC force may allow a more accurate determination of how failure of voluntary muscle activation contributes to weakness in old adults...
  26. ncbi request reprint Perturbation-enhanced neuromuscular training alters muscle activity in female athletes
    Wendy J Hurd
    Department of Physical Therapy, University of Delaware, Newark, DE 19716, USA
    Knee Surg Sports Traumatol Arthrosc 14:60-9. 2006
    ..These alterations in ACL agonist muscle activation patterns may reduce the risk of biomechanical strain injury among a high risk population...
  27. pmc Quadriceps femoris muscle weakness and activation failure in patients with symptomatic knee osteoarthritis
    Michael D Lewek
    Department of Physical Therapy and Biomechanics and Movement Science Program, 301 McKinly Laboratory, University of Delaware, Newark, DE 19716, USA
    J Orthop Res 22:110-5. 2004
    ....
  28. ncbi request reprint Accuracy of predicting maximal quadriceps force from submaximal effort contractions after anterior cruciate ligament injury
    Sara J Farquhar
    Department of Physical Therapy, University of Delaware, 301 McKinly Laboratory, Newark, Delaware 19716, USA
    Muscle Nerve 32:500-5. 2005
    ..We recommend use of the CAR calculation to provide estimations of true quadriceps strength to facilitate clinical decisions about progress in rehabilitation after ACL rupture...
  29. pmc Unilateral stance strategies of athletes with ACL deficiency
    Stephanie L Di Stasi
    Physical Therapy Department and Biomechanics and Movement Sciences Program, University of Delaware, Newark, DE, USA
    J Appl Biomech 28:374-86. 2012
    ..Neither treatment group showed distinct unilateral standing strategies following intervention; however, males and female noncopers appear to respond uniquely to physical therapy and surgery...
  30. pmc Influence of age, gender, and injury mechanism on the development of dynamic knee stability after acute ACL rupture
    Wendy J Hurd
    Department of Physical Therapy, University of Delaware, Newark, Delaware, USA
    J Orthop Sports Phys Ther 38:36-41. 2008
    ..Cross-sectional study...
  31. pmc A 10-year prospective trial of a patient management algorithm and screening examination for highly active individuals with anterior cruciate ligament injury: Part 1, outcomes
    Wendy J Hurd
    Department of Physical Therapy, University of Delaware, Newark, DE 19716, USA
    Am J Sports Med 36:40-7. 2008
    ..A treatment algorithm and screening examination have been developed to guide patient management and prospectively determine potential for highly active individuals to succeed with nonoperative care after anterior cruciate ligament rupture...
  32. pmc The Chitranjan Ranawat Award: The nonoperated knee predicts function 3 years after unilateral total knee arthroplasty
    Sara Farquhar
    Department of Physical Therapy, University of Delaware, Newark, DE 19716, USA
    Clin Orthop Relat Res 468:37-44. 2010
    ....
  33. ncbi request reprint Examining outcomes from total knee arthroplasty and the relationship between quadriceps strength and knee function over time
    Yuri Yoshida
    Department of Physical Therapy, Graduate Program in Biomechanics and Movement Sciences, Center for Biomedical Engineering Research University of Delaware, Newark, DE 19716, USA
    Clin Biomech (Bristol, Avon) 23:320-8. 2008
    ..The aim of this study was to determine whether quadriceps strength, clinical measures of knee function, lower limb kinematics, and joint moments improve following arthroplasty and normalize over time...
  34. pmc Early quadriceps strength loss after total knee arthroplasty. The contributions of muscle atrophy and failure of voluntary muscle activation
    Ryan L Mizner
    Department of Physical Therapy, 301 McKinly Laboratory, University of Delaware, Newark, Deleware 19716, USA
    J Bone Joint Surg Am 87:1047-53. 2005
    ..The purpose of the present investigation was to determine the role of failure of voluntary muscle activation and muscle atrophy in the early loss of quadriceps strength after surgery...
  35. ncbi request reprint Effect of dynamic stability on a step task in ACL deficient individuals
    Katherine S Rudolph
    Department of Physical Therapy, 301 McKinly Laboratory, University of Delaware, Newmark, DE 19716, USA
    J Electromyogr Kinesiol 14:565-75. 2004
    ..Classifying subjects by functional ability resulted in more pronounced differences in movement patterns between non-copers and copers. Copers moved more like uninjured subjects...
  36. ncbi request reprint Changes in weight-bearing following injury or surgical reconstruction of the ACL: relationship to quadriceps strength and function
    Terese L Chmielewski
    Biomechanics and Movement Science Program, University of Delaware, 301 McKinly Lab, Newark, DE 19716, USA
    Gait Posture 16:87-95. 2002
    ..Correlations between force platform test variables, quadriceps strength and functional self-report scores were also examined...
  37. pmc Minimum detectable change for knee joint contact force estimates using an EMG-driven model
    Emily S Gardinier
    Biomechanics and Movement Science Program, University of Delaware, Newark, DE, United States Delaware Rehabilitation Institute, University of Delaware, Newark, DE, United States
    Gait Posture 38:1051-3. 2013
    ..Adequate test-retest reliability of model estimates is a necessary precursor to examining treatment effects or longitudinal changes in individuals...
  38. pmc Quadriceps strength and weight acceptance strategies continue to improve two years after anterior cruciate ligament reconstruction
    Ben D Roewer
    University of Delaware Department of Physical Therapy, 301 McKinly Lab, Newark, DE 19716, USA
    J Biomech 44:1948-53. 2011
    ..They also suggest that non-copers have the capacity to improve their quadriceps strength and gait symmetry long after ACL reconstruction...
  39. doi request reprint Proximal gait adaptations in medial knee OA
    Kristin Briem
    Department of Physical Therapy and Graduate Program in Biomechanics and Movement Science, Mckinly Lab, University of Delaware, Newark, Delaware 19716, USA
    J Orthop Res 27:78-83. 2009
    ..These gait adaptations may have implications with respect to development of weakness of the ipsilateral hip musculature and progression of multiarticular OA...
  40. ncbi request reprint Altered knee kinematics in ACL-deficient non-copers: a comparison using dynamic MRI
    Peter J Barrance
    Center for Biomedical Engineering Research, Department of Mechanical Engineering, 126 Spencer Laboratory, University of Delaware, Newark, Delaware 19716, USA
    J Orthop Res 24:132-40. 2006
    ..The changes to active joint kinematics documented in this entirely noninvasive study may contribute to cartilage degradation in ACL-D knees, and encourage more extensive investigations using similar methodology in the future...
  41. ncbi request reprint Quadriceps strength and the time course of functional recovery after total knee arthroplasty
    Ryan L Mizner
    Department of Physical Therapy, University of Delaware, Newark, DE, USA
    J Orthop Sports Phys Ther 35:424-36. 2005
    ..Prospective study with repeated measures...
  42. pmc Gait after unilateral total knee arthroplasty: frontal plane analysis
    Ali H Alnahdi
    Graduate Program in Biomechanics and Movement Science, University of Delaware, 301 McKinly Lab, Newark, Delaware 19716, USA
    J Orthop Res 29:647-52. 2011
    ..While the non-operated knee loading was not different from controls, there may be greater risk of cumulative loading in the non-operated knee of the TKA group given the shorter step length...
  43. ncbi request reprint Altered quadriceps control in people with anterior cruciate ligament deficiency
    Glenn N Williams
    Center for Biomedical Engineering Research, University of Delaware, Newark, DE 19716, USA
    Med Sci Sports Exerc 36:1089-97. 2004
    ..The purpose of this study was to determine whether similar patterns of quadriceps dysfunction are observed when people with anterior cruciate ligament (ACL) deficiency perform static and dynamic tasks...
  44. pmc Single-legged hop tests as predictors of self-reported knee function after anterior cruciate ligament reconstruction: the Delaware-Oslo ACL cohort study
    David Logerstedt
    Department of Physical Therapy, College of Health Sciences, University of Delaware, 301 McKinly Lab, Newark, DE 19716, USA
    Am J Sports Med 40:2348-56. 2012
    ..Hop tests hold potential as predictive factors of self-reported knee function in individuals after ACL reconstruction...
  45. doi request reprint The effects of neuromuscular training on the gait patterns of ACL-deficient men and women
    Stephanie L Di Stasi
    University of Delaware, Biomechanics and Movement Science Program, Newark, DE, USA
    Clin Biomech (Bristol, Avon) 27:360-5. 2012
    ..The purpose of this investigation was to describe the effects of perturbation training on the gait characteristics of male and female non-copers...
  46. doi request reprint Persistence of altered movement patterns during a sit-to-stand task 1 year following unilateral total knee arthroplasty
    Sara J Farquhar
    Department of Physical Therapy, University of Delaware, Newark, DE 19716, USA
    Phys Ther 88:567-79. 2008
    ....
  47. pmc Preoperative predictors of persistent impairments during stair ascent and descent after total knee arthroplasty
    Joseph A Zeni
    Department of Physical Therapy, University of Delaware, Newark, DE 19716, USA
    J Bone Joint Surg Am 92:1130-6. 2010
    ..The purpose of the present study was to determine preoperative predictors of handrail use during stair ascent and descent following primary unilateral total knee arthroplasty...
  48. pmc A 10-year prospective trial of a patient management algorithm and screening examination for highly active individuals with anterior cruciate ligament injury: Part 2, determinants of dynamic knee stability
    Wendy J Hurd
    Department of Physical Therapy, University of Delaware, Newark, DE 19716, USA
    Am J Sports Med 36:48-56. 2008
    ..To clarify the determinants of dynamic knee stability early after anterior cruciate ligament injury...
  49. ncbi request reprint Voluntary activation and decreased force production of the quadriceps femoris muscle after total knee arthroplasty
    Ryan L Mizner
    Biomechanics and Movement Science Program, Department of Physical Therapy, University of Delaware, Newark, Del 19716, USA
    Phys Ther 83:359-65. 2003
    ....
  50. pmc Knee stabilization in patients with medial compartment knee osteoarthritis
    Michael D Lewek
    University of Delaware, Newark 19716, USA
    Arthritis Rheum 52:2845-53. 2005
    ..This study sought to determine how individuals with medial knee OA respond to a rapid valgus knee movement, to investigate the relationship between muscle-stabilization strategies and knee instability...
  51. ncbi request reprint Altered loading during walking and sit-to-stand is affected by quadriceps weakness after total knee arthroplasty
    Ryan L Mizner
    Department of Physical Therapy, University of Delaware, Newark, DE 19716, USA
    J Orthop Res 23:1083-90. 2005
    ..We hypothesized that quadriceps strength affects performance by altering loading and movement patterns during functional tasks...
  52. pmc Anterior cruciate ligament- specialized post-operative return-to-sports (ACL-SPORTS) training: a randomized control trial
    Kathleen White
    University of Delaware, Biomechanics and Movement Science Program, Newark, DE, USA
    BMC Musculoskelet Disord 14:108. 2013
    ..Implementing perturbation training after surgery may be successful in addressing post-operative deficits that contribute to poor functional outcomes and second ACL injury risk...
  53. doi request reprint Improved function from progressive strengthening interventions after total knee arthroplasty: a randomized clinical trial with an imbedded prospective cohort
    Stephanie C Petterson
    University of Delaware, Newark, DE, USA
    Arthritis Rheum 61:174-83. 2009
    ....
  54. pmc Perception and presentation of function in patients with unilateral versus bilateral knee osteoarthritis
    Adam R Marmon
    University of Delaware, Department of Physical Therapy, Newark, DE 19716, USA
    Arthritis Care Res (Hoboken) 65:406-13. 2013
    ..The purpose of this study was to determine if there were differences in perception of function and performance during functional tasks between individuals with unilateral and bilateral knee OA...
  55. pmc Measuring functional improvement after total knee arthroplasty requires both performance-based and patient-report assessments: a longitudinal analysis of outcomes
    Ryan L Mizner
    Department of Physical Therapy, University of Delaware, 301 McKinly Laboratory, Newark, Delaware 19716, USA
    J Arthroplasty 26:728-37. 2011
    ..Patient perception fails to capture the acute functional declines after TKA and may overstate the long-term functional improvement with surgery...
  56. pmc Sit-to-stand 3 months after unilateral total knee arthroplasty: comparison of self-selected and constrained conditions
    Sara J Farquhar
    Department of Physical Therapy, University of Delaware, 301 McKinly Laboratory, Newark, DE 19716, USA
    Gait Posture 30:187-91. 2009
    ..Reliance on the non-operated limb may put them at risk for progression of osteoarthritis in other joints of the lower extremities...
  57. pmc Time course of quad strength, area, and activation after knee arthroplasty and strength training
    Stephanie C Petterson
    Department of Physical Therapy, University of Delaware, Newark, DE, USA
    Med Sci Sports Exerc 43:225-31. 2011
    ....
  58. ncbi request reprint Dynamic knee stability after anterior cruciate ligament rupture
    Michael D Lewek
    Department of Physical Therapy and Biomechanics, Movement Science Program, University of Delaware, Newark 19716, USA
    Exerc Sport Sci Rev 31:195-200. 2003
    ..Biomechanical, electromyographic, and clinical data support the classification scheme and perturbation training for improving dynamic knee stability...
  59. ncbi request reprint A prospective analysis of incidence and severity of quadriceps inhibition in a consecutive sample of 100 patients with complete acute anterior cruciate ligament rupture
    Terese L Chmielewski
    Department of Physical Therapy, University of Delaware, Newark 19716, USA
    J Orthop Res 22:925-30. 2004
    ....
  60. ncbi request reprint The use of neuromuscular electrical stimulation to improve activation deficits in a patient with chronic quadriceps strength impairments following total knee arthroplasty
    Stephanie Petterson
    Department of Physical Therapy, University of Delaware, Newark, DE 19716, USA
    J Orthop Sports Phys Ther 36:678-85. 2006
    ..Case report...
  61. ncbi request reprint Functional and perceived response to intra-articular hyaluronan injection in patients with knee osteoarthritis: persistence of treatment effects over 5 months
    Kristin Briem
    301 McKinly Lab, University of Delaware, Newark, DE 19716, USA
    Knee Surg Sports Traumatol Arthrosc 17:763-9. 2009
    ..Such information may provide valuable input when decisions are made regarding which treatment option is recommended to individuals with knee osteoarthritis...
  62. ncbi request reprint Preoperative Predictors for Noncopers to Pass Return to Sports Criteria After ACL Reconstruction
    Erin H Hartigan
    Physical Therapy Department and Biomechanics and Movement Sciences Program, University of Delaware, Newark, DE, and with the Physical Therapy Department, University of New England, Portland, ME
    J Appl Biomech 28:366-73. 2012
    ..Further, 63% of those who increased preoperative quadriceps strength passed RTS criteria, whereas 73% who did not failed. Increasing quadriceps strength in noncopers before ACLR seems warranted...
  63. doi request reprint Interrater reliability of a clinical scale to assess knee joint effusion
    Lynne Patterson Sturgill
    University of Delaware Sports and Orthopedic Physical Therapy Clinic, Newark, 19711, USA
    J Orthop Sports Phys Ther 39:845-9. 2009
    ..Clinical measurement...
  64. pmc Clinical outcomes after simultaneous bilateral total knee arthroplasty: comparison to unilateral total knee arthroplasty and healthy controls
    Joseph A Zeni
    Department of Physical Therapy, University of Delaware, Newark, Delaware 19716, USA
    J Arthroplasty 25:541-6. 2010
    ..In addition, most 2-year clinical measures were no different between the surgical and control groups. Subjects medically appropriate for bilateral TKA should be afforded this option...
  65. ncbi request reprint Single-step test for unilateral limb ability following total knee arthroplasty
    Adam Rubin Marmon
    University of Delaware, Newark, DE, USA
    J Orthop Sports Phys Ther 43:66-73. 2013
    ..Secondary analysis of a cohort enrolled in a prospective, randomized, longitudinal clinical trial...
  66. ncbi request reprint Unilateral Stance Strategies of Athletes with ACL Deficiency
    Stephanie L Di Stasi
    Was with the Physical Therapy Department and Biomechanics and Movement Sciences Program, University of Delaware, Newark, DE Currently with the Sports Health and Performance Institute, Ohio State University, Columbus, OH
    J Appl Biomech 28:374-86. 2012
    ..Neither treatment group showed distinct unilateral standing strategies following intervention; however, males and female noncopers appear to respond uniquely to physical therapy and surgery...
  67. pmc Functional and biomechanical outcomes after using biofeedback for retraining symmetrical movement patterns after total knee arthroplasty: a case report
    Jodie McClelland
    Department of Physical Therapy, University of Delaware, Newark, DE, USA
    J Orthop Sports Phys Ther 42:135-44. 2012
    ..Case report...
  68. ncbi request reprint Are voluntary muscle activation deficits in older adults meaningful?
    Jennifer E Stevens
    Department of Physical Therapy, Room 301 McKinly Laboratory, University of Delaware, Newark, Delaware 19716, USA
    Muscle Nerve 27:99-101. 2003
    ..005). The mean difference between older and younger adults was 11%, which may be more meaningful than previous reports of 2-4% because it could explain the greater rate of strength loss as compared to loss of muscle mass as humans age...
  69. ncbi request reprint Development of dynamic knee stability after acute ACL injury
    Terese L Chmielewski
    Department of Physical Therapy, University of Delaware, Newark, DE 19715, USA
    J Electromyogr Kinesiol 12:267-74. 2002
    ..The relationships formed between muscles post-training suggests that perturbation training enhances dynamic knee stability by inducing a well-coordinated strategy among muscles that affect tibial translation...
  70. ncbi request reprint Resident's case problem: diagnosis and treatment of posterolateral instability in a patient with lateral collateral ligament sprain
    Alison T DeLeo
    Physical Therapy Services, Inc, Dover, DE, USA
    J Orthop Sports Phys Ther 33:185-91; discussion 191-5. 2003
  71. pmc Individuals with an anterior cruciate ligament-deficient knee classified as noncopers may be candidates for nonsurgical rehabilitation
    Havard Moksnes
    NAR, Orthopedic Center, Ullevaal University Hospital, Oslo, Norway
    J Orthop Sports Phys Ther 38:586-95. 2008
    ..Prospective cohort study...
  72. ncbi request reprint The effect of insufficient quadriceps strength on gait after anterior cruciate ligament reconstruction
    Michael Lewek
    Department of Physical Therapy, 301 McKinly Lab, University of Delaware, Newark, DE 19716, USA
    Clin Biomech (Bristol, Avon) 17:56-63. 2002
    ..To determine the effect of quadriceps strength and joint stability on gait patterns after anterior cruciate ligament injury and reconstruction...
  73. ncbi request reprint Eccentric muscle contractions: their contribution to injury, prevention, rehabilitation, and sport
    Paul C LaStayo
    Division of Physical Therapy, University of Utah, Salt Lake City, UT 84108, USA
    J Orthop Sports Phys Ther 33:557-71. 2003
    ..Specifically, we explore the nature of the structural changes and how these adaptations may help prevent musculoskeletal injury, improve sport performance, and overcome musculoskeletal impairments...
  74. ncbi request reprint Return to official Italian First Division soccer games within 90 days after anterior cruciate ligament reconstruction: a case report
    Giulio S Roi
    Isokinetic Education and Research Department, Bologna, Italy
    J Orthop Sports Phys Ther 35:52-61; discussion 61-6. 2005
    ..Case report...
  75. pmc Stride-to-stride variability of knee motion in patients with knee osteoarthritis
    Michael D Lewek
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Department of Physical Medicine and Rehabilitation, Northwestern University, 345 E Superior St, Suite 1406, Chicago, IL 60611, USA
    Gait Posture 23:505-11. 2006
    ..The purpose of this study was to quantify knee motion variability during gait and assess the influence of muscle activity, frontal plane laxity, and pain on knee movement variability in patients with medial knee OA...
  76. ncbi request reprint Perturbation training improves knee kinematics and reduces muscle co-contraction after complete unilateral anterior cruciate ligament rupture
    Terese L Chmielewski
    Department of Physical Therapy, University of Florida, Gainsville, FL, USA
    Phys Ther 85:740-9; discussion 750-4. 2005
    ..The purpose of this study was to determine how perturbation training alters muscle co-contraction and knee kinematics in potential copers...
  77. ncbi request reprint Appropriate interpretation and application of a clinical classification scheme to describe dynamic knee stability after ACL injury
    Terese L Chmielewski
    J Neurophysiol 98:557. 2007
  78. doi request reprint Proximal tibiofibular dislocation/sublaxation
    Michael J Axe
    J Orthop Sports Phys Ther 38:87. 2008
  79. pmc Measurement of impact acceleration: mouthpiece accelerometer versus helmet accelerometer
    Michael Higgins
    Towson University, Towson, MD 21252, USA
    J Athl Train 42:5-10. 2007
    ..These instrumented helmets may not accurately measure the actual amount of acceleration experienced by the head due to factors such as helmet-to-head fit...
  80. ncbi request reprint The drop-jump screening test: difference in lower limb control by gender and effect of neuromuscular training in female athletes
    Timothy Hewett
    Am J Sports Med 35:145; author reply 146-7. 2007
  81. pmc Mechanisms underlying quadriceps weakness in knee osteoarthritis
    Stephanie C Petterson
    School of Health and Bioscience, University of East London, London, U K
    Med Sci Sports Exerc 40:422-7. 2008
    ..To identify determinants of quadriceps weakness among persons with end-stage knee osteoarthritis (OA)...
  82. ncbi request reprint Neuromuscular electrical stimulation for quadriceps muscle strengthening after bilateral total knee arthroplasty: a case series
    Jennifer E Stevens
    Department of Physical Therapy, University of Florida, Gainesville, FL, USA
    J Orthop Sports Phys Ther 34:21-9. 2004
    ..A case series...
  83. ncbi request reprint Muscle and tendon morphology after reconstruction of the anterior cruciate ligament with autologous semitendinosus-gracilis graft
    Glenn N Williams
    Graduate Program in Physical Therapy and Rehabilitation Science, Carver College of Medicine, University of Iowa, 1 247 Medical Education Building, Iowa City, IA 52242, USA
    J Bone Joint Surg Am 86:1936-46. 2004
    ..The effect that graft harvest has on muscle and tendon morphology remains unclear. The purpose of this study was to describe these effects more completely...
  84. pmc A mechanical theory for the effectiveness of bracing for medial compartment osteoarthritis of the knee
    Dan K Ramsey
    Department of Exercise and Nutrition Science, University at Buffalo, State University of New York, 214 Kimball Tower, South Campus, Buffalo, NY 14214 8028, USA
    J Bone Joint Surg Am 89:2398-407. 2007
    ..In this study, therefore, we sought to examine the degree to which so-called unloader braces control knee instability and influence muscle cocontractions during gait...

Research Grants21

  1. DYNAMIC STABILITY IN THE ACL INJURED KNEE
    Lynn Snyder Mackler; Fiscal Year: 2001
    ....
  2. Dynamic Stability of the ACL Deficient Knee
    Lynn Snyder Mackler; Fiscal Year: 2009
    ..Results from this study will allow us extend our previous findings and will provide information that is needed to identify and treat individuals with ACL rupture across the spectrum of compensation strategies. ..
  3. Dynamic Stability of the ACL Deficient Knee
    Lynn Snyder Mackler; Fiscal Year: 2009
    ..Results from this study will allow us extend our previous findings and will provide information that is needed to identify and treat individuals with ACL rupture across the spectrum of compensation strategies. ..
  4. Can Neuromuscular Training Alter Movement Patterns?
    Lynn Snyder Mackler; Fiscal Year: 2007
    ..abstract_text> ..
  5. Dynamic Stability of the ACL Deficient Knee
    Lynn Snyder Mackler; Fiscal Year: 2006
    ..Results from this study will allow us extend our previous findings and will provide information that is needed to identify and treat individuals with ACL rupture across the spectrum of compensation strategies. ..
  6. Dynamic Stability of the ACL Deficient Knee
    Lynn Snyder Mackler; Fiscal Year: 2010
    ..Results from this study will allow us extend our previous findings and will provide information that is needed to identify and treat individuals with ACL rupture across the spectrum of compensation strategies. ..
  7. Motion Analysis System for Study of Human Movement Dysfunction
    Lynn Snyder Mackler; Fiscal Year: 2006
    ....
  8. NMES for Older Individuals After Total Knee Arthroplasty
    Lynn Snyder Mackler; Fiscal Year: 2005
    ..abstract_text> ..
  9. NMES for Older Individuals After Total Knee Arthroplasty
    Lynn Snyder Mackler; Fiscal Year: 2002
    ..abstract_text> ..
  10. DYNAMIC STABILITY IN THE ACL INJURED KNEE
    Lynn Snyder Mackler; Fiscal Year: 2002
    ....
  11. NMES for Older Individuals After Total Knee Arthroplasty
    Lynn Snyder Mackler; Fiscal Year: 2004
    ..abstract_text> ..
  12. DYNAMIC STABILITY IN THE ACL INJURED KNEE
    Lynn Snyder Mackler; Fiscal Year: 2004
    ....
  13. Can Neuromuscular Training Alter Movement Patterns?
    Lynn Snyder Mackler; Fiscal Year: 2009
    ..abstract_text> ..
  14. NMES for Older Individuals After Total Knee Arthroplasty
    Lynn Snyder Mackler; Fiscal Year: 2003
    ..abstract_text> ..
  15. DYNAMIC STABILITY IN THE ACL INJURED KNEE
    Lynn Snyder Mackler; Fiscal Year: 2003
    ....
  16. Dynamic Stability of the ACL Deficient Knee
    Lynn Snyder Mackler; Fiscal Year: 2007
    ..Results from this study will allow us extend our previous findings and will provide information that is needed to identify and treat individuals with ACL rupture across the spectrum of compensation strategies. ..
  17. NMES for Older Individuals After Total Knee Arthroplasty
    Lynn Snyder Mackler; Fiscal Year: 2006
    ..abstract_text> ..
  18. Can Neuromuscular Training Alter Movement Patterns?
    Lynn Snyder Mackler; Fiscal Year: 2005
    ..abstract_text> ..
  19. Can Neuromuscular Training Alter Movement Patterns?
    Lynn Snyder Mackler; Fiscal Year: 2006
    ..abstract_text> ..