SANDRA SHULTZ

Summary

Affiliation: University of North Carolina at Greensboro
Country: USA

Publications

  1. ncbi request reprint The differential effects of fatigue on reflex response timing and amplitude in males and females
    Brian D Moore
    University of Southern California University Hospital, Los Angeles, CA, USA
    J Electromyogr Kinesiol 12:351-60. 2002
  2. ncbi request reprint Bilateral asymmetries in clinical measures of lower-extremity anatomic characteristics
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, University of North Carolina at Greensboro, Greensboro, NC, USA
    Clin J Sport Med 17:357-61. 2007
  3. ncbi request reprint Reliability and validity of the Biodex system 3 pro isokinetic dynamometer velocity, torque and position measurements
    Joshua M Drouin
    Department of Public Health, Georgia Southern University, PO Box 8076, Statesboro, GA 30460 8076, USA
    Eur J Appl Physiol 91:22-9. 2004
  4. ncbi request reprint Sex differences in lower extremity biomechanics during single leg landings
    Randy J Schmitz
    Applied Neuromechanics Research Laboratory, 250 HHP, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
    Clin Biomech (Bristol, Avon) 22:681-8. 2007
  5. pmc Effects of transverse and frontal plane knee laxity on hip and knee neuromechanics during drop landings
    Sandra J Shultz
    University of North Carolina at Greensboro, Department of Kinesiology, 1408 Walker Avenue, Greensboro, NC 27402, USA
    Am J Sports Med 37:1821-30. 2009
  6. pmc Collagen gene variants previously associated with anterior cruciate ligament injury risk are also associated with joint laxity
    Richard D Bell
    Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, North Carolina
    Sports Health 4:312-8. 2012
  7. doi request reprint Multiplanar knee laxity increases during a 90-min intermittent exercise protocol
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
    Med Sci Sports Exerc 45:1553-61. 2013
  8. doi request reprint Associations between lower extremity muscle mass and multiplanar knee laxity and stiffness: a potential explanation for sex differences in frontal and transverse plane knee laxity
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
    Am J Sports Med 40:2836-44. 2012
  9. ncbi request reprint Tibial plateau geometry influences lower extremity biomechanics during landing
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, North Carolina 27455, USA
    Am J Sports Med 40:2029-36. 2012
  10. pmc Changes in serum collagen markers, IGF-I, and knee joint laxity across the menstrual cycle
    Sandra J Shultz
    Department of Kinesiology, University of North Carolina at Greensboro, 1408 Walker Ave, Greensboro, NC 27402, USA
    J Orthop Res 30:1405-12. 2012

Research Grants

Collaborators

Detail Information

Publications47

  1. ncbi request reprint The differential effects of fatigue on reflex response timing and amplitude in males and females
    Brian D Moore
    University of Southern California University Hospital, Los Angeles, CA, USA
    J Electromyogr Kinesiol 12:351-60. 2002
    ..Results suggest males and females may respond differently to isokinetic fatigue, with males having a greater capacity to compensate for contraction force failure when responding to mechanical perturbations...
  2. ncbi request reprint Bilateral asymmetries in clinical measures of lower-extremity anatomic characteristics
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, University of North Carolina at Greensboro, Greensboro, NC, USA
    Clin J Sport Med 17:357-61. 2007
    ..To quantify side-to-side differences in lower-extremity anatomic characteristics, and to compare the magnitude of left-right differences with the measurement error for each variable...
  3. ncbi request reprint Reliability and validity of the Biodex system 3 pro isokinetic dynamometer velocity, torque and position measurements
    Joshua M Drouin
    Department of Public Health, Georgia Southern University, PO Box 8076, Statesboro, GA 30460 8076, USA
    Eur J Appl Physiol 91:22-9. 2004
    ..With the exception of a systematic decrease in velocity at speeds of 300 degrees/s and higher, the Biodex System 3 performed with acceptable mechanical reliability and validity on all variables tested...
  4. ncbi request reprint Sex differences in lower extremity biomechanics during single leg landings
    Randy J Schmitz
    Applied Neuromechanics Research Laboratory, 250 HHP, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
    Clin Biomech (Bristol, Avon) 22:681-8. 2007
    ....
  5. pmc Effects of transverse and frontal plane knee laxity on hip and knee neuromechanics during drop landings
    Sandra J Shultz
    University of North Carolina at Greensboro, Department of Kinesiology, 1408 Walker Avenue, Greensboro, NC 27402, USA
    Am J Sports Med 37:1821-30. 2009
    ..This study compared persons with above-and below-average LAX(VV) and LAX(IER) values on hip and knee neuromechanics during drop jump landings...
  6. pmc Collagen gene variants previously associated with anterior cruciate ligament injury risk are also associated with joint laxity
    Richard D Bell
    Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, North Carolina
    Sports Health 4:312-8. 2012
    ..Joint laxity may constitute an important intermediate phenotype for the genetic association with ACL injury that can be measured clinically...
  7. doi request reprint Multiplanar knee laxity increases during a 90-min intermittent exercise protocol
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
    Med Sci Sports Exerc 45:1553-61. 2013
    ..This study aimed to examine changes in sagittal (AP LAX), frontal (VV LAX), and transverse (IER LAX) plane knee laxity in men and women during an intermittent exercise protocol (IEP) simulating the intensity and duration of a soccer match...
  8. doi request reprint Associations between lower extremity muscle mass and multiplanar knee laxity and stiffness: a potential explanation for sex differences in frontal and transverse plane knee laxity
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
    Am J Sports Med 40:2836-44. 2012
    ..While the underlying cause is unclear, the amount of lower extremity lean mass (LELM) may be a contributing factor...
  9. ncbi request reprint Tibial plateau geometry influences lower extremity biomechanics during landing
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, North Carolina 27455, USA
    Am J Sports Med 40:2029-36. 2012
    ..Understanding how these structural characteristics influence hip and knee joint biomechanics during weightbearing activity may advance our understanding of how tibial plateau geometry influences one's injury risk potential. Purpose/..
  10. pmc Changes in serum collagen markers, IGF-I, and knee joint laxity across the menstrual cycle
    Sandra J Shultz
    Department of Kinesiology, University of North Carolina at Greensboro, 1408 Walker Ave, Greensboro, NC 27402, USA
    J Orthop Res 30:1405-12. 2012
    ..310 and 0.400). Sex hormone concentration changes across the menstrual cycle are of sufficient magnitude to influence collagen metabolism, and may indirectly influence knee structure and function...
  11. ncbi request reprint Cyclic variations in multiplanar knee laxity influence landing biomechanics
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, School of Health and Human Performance, University of North Carolina at Greensboro, NC 27402, USA
    Med Sci Sports Exerc 44:900-9. 2012
    ..We then compared changes in landing biomechanics from days of minimum to maximum laxity between female clusters and a group of males...
  12. pmc Identifying multiplanar knee laxity profiles and associated physical characteristics
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, Department of Kinesiology, 1408 Walker Avenue, Greensboro, NC 27402, USA
    J Athl Train 47:159-69. 2012
    ..A single measure of knee laxity (ie, measurement of laxity in a single plane of motion) is probably inadequate to fully describe how knee joint laxity is associated with anterior cruciate ligament injury...
  13. doi request reprint Methodological considerations of task and shoe wear on joint energetics during landing
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, University of North Carolina at Greensboro, NC 27412, United States
    J Electromyogr Kinesiol 22:124-30. 2012
    ..The impact of these methodological differences should be considered when comparing landing biomechanics across studies...
  14. ncbi request reprint Differences in lower extremity anatomical and postural characteristics in males and females between maturation groups
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, Department of Exercise and Sport Science, University of North Carolina at Greensboro, 1408 Walker Ave, Greensboro, NC 27402, USA
    J Orthop Sports Phys Ther 38:137-49. 2008
    ..Descriptive, cross-sectional...
  15. pmc Sex differences in coupled knee motions during the transition from non-weight bearing to weight bearing
    Sandra J Shultz
    Department of Exercise and Sport Science, University of North Carolina at Greensboro, 1408 Walker Avenue, Greensboro, North Carolina 27402, USA
    J Orthop Res 27:717-23. 2009
    ..Our findings suggest that the coupled knee motions produced during the transition from NWB to WB are sex dependent, and may provide insight into the knee motion patterns that place females at increased risk of knee ligament injury...
  16. pmc Sex differences in knee joint laxity change across the female menstrual cycle
    S J Shultz
    Applied Neuromechanics Research Laboratory, Department of Exercise and Sport Science, University of North Carolina, Greensboro, NC 27402 6170, USA
    J Sports Med Phys Fitness 45:594-603. 2005
    ....
  17. pmc Knee joint laxity and its cyclic variation influence tibiofemoral motion during weight acceptance
    Sandra J Shultz
    1School of Health and Human Performance, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
    Med Sci Sports Exerc 43:287-95. 2011
    ....
  18. pmc Thigh strength and activation as predictors of knee biomechanics during a drop jump task
    Sandra J Shultz
    Department of Exercise and Sport Science, University of North Carolina at Greensboro, NC 27412, USA
    Med Sci Sports Exerc 41:857-66. 2009
    ..To examine whether normalized quadriceps and hamstring strength would predict quadriceps and hamstring muscle activation amplitudes and whether these neuromuscular factors would predict knee kinematics and kinetics during a drop jump task...
  19. pmc Joint laxity is related to lower extremity energetics during a drop jump landing
    Sandra J Shultz
    School of Health and Human Performance, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
    Med Sci Sports Exerc 42:771-80. 2010
    ..To examine the relationships between anterior knee laxity (AKL), genu recurvatum (GR), and general joint laxity (GJL) with sagittal plane energetics in males and females during a drop jump task...
  20. pmc Some sex hormone profiles are consistent over time in normal menstruating women: implications for sports injury epidemiology
    S J Shultz
    School of Health and Human Performance, University of North Carolina at Greensboro, USA
    Br J Sports Med 45:735-42. 2011
    ..Month-to-month consistency in daily, nadir, peak and mean hormone concentrations during the early follicular and luteal phases in recreationally active, young eumenorrheic women was prospectively examined...
  21. pmc Relationship between sex hormones and anterior knee laxity across the menstrual cycle
    Sandra J Shultz
    The University of North Carolina at Greensboro, Greensboro, NC University of Virginia, Charlottesville, VA 27402, USA
    Med Sci Sports Exerc 36:1165-74. 2004
    ..To comprehensively quantify through daily, serial measures changes in knee laxity as a function of changing sex-hormone levels across one complete menstrual cycle...
  22. ncbi request reprint Low levels of anterior tibial loading enhance knee extensor reflex response characteristics
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, Department of Exercise and Sport Science, University of North Carolina at Greensboro, 237B HHP Building, P O Box 26170, Greensboro, NC 27402 6170, USA
    J Electromyogr Kinesiol 15:61-71. 2005
    ..20 N(Post), and EMD was shorter at 50 N vs. 20 N, 20 N(Pre) and 20 N(Post). These results suggest that knee extensor reflex responses are enhanced with low (50 N) but not moderate (100 N) anterior loading of the knee...
  23. pmc Absolute serum hormone levels predict the magnitude of change in anterior knee laxity across the menstrual cycle
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, The University of North Carolina at Greensboro, 237B HHP Building, Greensboro, NC 27402, USA
    J Orthop Res 24:124-31. 2006
    ..The absolute minimum concentrations of E and P in the early follicular phase appear to be important factors in determining the sensitivity of the knee joint's response to changing hormone levels...
  24. ncbi request reprint Knee joint laxity affects muscle activation patterns in the healthy knee
    Sandra J Shultz
    Department of Exercise and Sport Science, University of North Carolina at Greensboro, 237B HHP Building, PO Box 26170, Greensboro NC 27402 6170, USA
    J Electromyogr Kinesiol 14:475-83. 2004
    ....
  25. ncbi request reprint Nonweight-bearing anterior knee laxity is related to anterior tibial translation during transition from nonweight bearing to weight bearing
    Sandra J Shultz
    Applied Neuromechanics, Exercise and Sport Science, The University of North Carolina at Greensboro, P O Box 26170, 237B HHP Bldg, Greensboro, NC 27402 6170, USA
    J Orthop Res 24:516-23. 2006
    ..The potential for increased knee joint laxity to disrupt normal knee biomechanics during activities such as landing from a jump, or the foot strike phase of gait deserves further study...
  26. pmc Variations in varus/valgus and internal/external rotational knee laxity and stiffness across the menstrual cycle
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, North Carolina, USA
    J Orthop Res 29:318-25. 2011
    ..Whether these findings reflect ligament-specific responses to hormone changes, or implicate changes in injury risk potential across the menstrual cycle requires further study...
  27. ncbi request reprint Measurement of varus-valgus and internal-external rotational knee laxities in vivo--Part I: assessment of measurement reliability and bilateral asymmetry
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, Department of Exercise and Sport Science, University of North Carolina at Greensboro, 237B HHP Building, P O Box 26170, Greensboro, North Carolina 27402 6170, USA
    J Orthop Res 25:981-8. 2007
    ..The VKLD yields reliable measures of VR-VL and INT-EXT laxities, with sufficient measurement precision to yield clinically relevant differences...
  28. ncbi request reprint Measurement of varus-valgus and internal-external rotational knee laxities in vivo--Part II: relationship with anterior-posterior and general joint laxity in males and females
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, Department of Exercise and Sport Science, University of North Carolina at Greensboro, 237B HHP Building, P O Box 26170, Greensboro, North Carolina 27402 6170, USA
    J Orthop Res 25:989-96. 2007
    ..ANT was the sole predictor of INT-EXT in NWB, explaining 42.3% of the variance. These findings suggest that subjects who score higher on clinical measures of GJL and ANT are also likely to have greater VR-VL and INT-EXT knee laxities...
  29. pmc Isometric knee-extension and knee-flexion torque production during early follicular and postovulatory phases in recreationally active women
    Melissa M Montgomery
    Department of Kinesiology, Applied Neuromechanics Research Laboratory, University of North Carolina at Greensboro, NC 27402 6170, USA
    J Athl Train 45:586-93. 2010
    ..Acute decreases in strength have been associated with risky biomechanical strategies that might predispose one to injury. Whether acute changes in thigh muscle torque occur across the menstrual cycle remains equivocal...
  30. pmc Contribution of knee flexor and extensor strength on sex-specific energy absorption and torsional joint stiffness during drop jumping
    Randy J Schmitz
    Department of Kinesiology, University of North Carolina at Greensboro, NC 27402, USA
    J Athl Train 45:445-52. 2010
    ....
  31. ncbi request reprint Kinematic analysis of functional lower body perturbations
    Randy J Schmitz
    Applied Neuromechanics Research Laboratory, Exercise and Sport Science, 250 HHP, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
    Clin Biomech (Bristol, Avon) 19:1032-9. 2004
    ....
  32. doi request reprint Effect of axial load on anterior tibial translation when transitioning from non-weight bearing to weight bearing
    Randy J Schmitz
    University of North Carolina at Greensboro, Department of Kinesiology, 250 HHP, Greensboro, NC 27402, USA
    Clin Biomech (Bristol, Avon) 25:77-82. 2010
    ..We investigated the effects of increasing axial loads on anterior tibial translation and thigh muscle activity in healthy knees during transition from non-weight bearing to early weight bearing...
  33. ncbi request reprint Postural control deficits in participants with functional ankle instability as measured by the balance error scoring system
    Carrie L Docherty
    Department of Kinesiology, Indiana University, Bloomington, IN 47408, USA
    Clin J Sport Med 16:203-8. 2006
    ..To determine if postural control deficits are present in participants with functional ankle instability (FAI) as measured by the Balance Error Scoring System (BESS)...
  34. pmc Relationships between lower extremity alignment and the quadriceps angle
    Anh Dung Nguyen
    Applied Neuromechanics Research Laboratory, University of North Carolina at Greensboro, Greensboro, North Carolina 27412, USA
    Clin J Sport Med 19:201-6. 2009
    ..To determine the extent to which select lower extremity alignment characteristics of the pelvis, hip, knee, and foot are related to the Q angle...
  35. pmc Dynamic valgus alignment and functional strength in males and females during maturation
    Randy J Schmitz
    University of North Carolina at Greensboro, Department of Exercise and Sport Science, 250 Health and Human Performance Building, Greensboro, NC 27402, USA
    J Athl Train 44:26-32. 2009
    ..Gaining information on maturation's effect on dynamic performance measures implicated in injury risk may enable us to better design injury prevention programs...
  36. ncbi request reprint Sex differences in clinical measures of lower extremity alignment
    Anh Dung Nguyen
    Applied Neuromechanics Research Laboratory, The University of North Carolina at Greensboro, Greensboro, NC 27412, USA
    J Orthop Sports Phys Ther 37:389-98. 2007
    ..Descriptive, cohort design...
  37. pmc Varus/valgus and internal/external torsional knee joint stiffness differs between sexes
    Randy J Schmitz
    Applied Neuromechanics Research Laboratory, University of North Carolina, Greensboro, Department of Exercise and Sport Science, 250 HHP Building, Greensboro, NC 27402 6170, USA
    Am J Sports Med 36:1380-8. 2008
    ..Torsional joint stiffness is thought to play a role in the observed sex bias in noncontact anterior cruciate ligament injury rates...
  38. pmc Identifying relationships among lower extremity alignment characteristics
    Anh Dung Nguyen
    University of North Carolina at Greensboro, Greensboro, NC, USA
    J Athl Train 44:511-8. 2009
    ..Examining the relationships among alignment variables may allow us to more accurately describe lower extremity posture and clarify the relationship between lower extremity alignment and injury risk in future studies...
  39. pmc Triple-hop distance as a valid predictor of lower limb strength and power
    R Tyler Hamilton
    The University of North Carolina at Greensboro, Greensboro, NC 27402 6170, USA
    J Athl Train 43:144-51. 2008
    ..Hop tests are functional tests that reportedly require strength, power, and postural stability to perform. The extent to which a triple-hop distance (THD) test measures each of these characteristics is relatively unknown...
  40. pmc A comparison of cyclic variations in anterior knee laxity, genu recurvatum, and general joint laxity across the menstrual cycle
    Sandra J Shultz
    Department of Kinesiology, Applied Neuromechanics Research Laboratory, University of North Carolina at Greensboro, 1408 Walker Ave, Greensboro, North Carolina 27402, USA
    J Orthop Res 28:1411-7. 2010
    ..07 to 0.43). Substantial, similar, and reproducible cyclic changes in AKL, GR, and GJL were observed across the menstrual cycle, with the magnitude and pattern of cyclic changes varying considerably among females...
  41. ncbi request reprint Intratester and intertester reliability of clinical measures of lower extremity anatomic characteristics: implications for multicenter studies
    Sandra J Shultz
    Applied Neuromechanics Research Laboratory, 237B HHP, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
    Clin J Sport Med 16:155-61. 2006
    ..We also determined whether testers trained 18 months apart could perform these measurements with good agreement...
  42. ncbi request reprint Females recruit quadriceps faster than males at multiple knee flexion angles following a weight-bearing rotary perturbation
    Christopher R Carcia
    Department of Physical Therapy, Rangos School of Health Sciences, Duquesne University, Pittsburgh, PA 15282, USA
    Clin J Sport Med 15:167-71. 2005
    ..We hypothesized that response times would be faster at lesser knee flexion angles and that females would recruit their quadriceps faster than males at all angles...
  43. ncbi request reprint Knee ligament behavior following a controlled loading protocol does not differ by menstrual cycle day
    Christopher R Carcia
    Department of Physical Therapy, Rangos School of Health Sciences, Duquesne University, Pittsburgh, PA 15282, USA
    Clin Biomech (Bristol, Avon) 19:1048-54. 2004
    ..Determining whether the knee responds differently to an external load at various hormonal levels may be helpful in further explaining the gender disparity...
  44. ncbi request reprint Rate of force application during knee arthrometer testing affects stiffness but not displacement measurements
    Steven M Gross
    St John s University, Jamaica, NY, USA
    J Orthop Sports Phys Ther 34:132-9. 2004
    ..Repeated-measures counterbalanced design...
  45. ncbi request reprint Understanding and preventing noncontact anterior cruciate ligament injuries: a review of the Hunt Valley II meeting, January 2005
    Letha Y Griffin
    Peachtree Orthopaedic Clinic, Atlanta, GA 30309, USA
    Am J Sports Med 34:1512-32. 2006
    ..This article reports on the presentations, discussions, and recommendations of this group...
  46. pmc Mechanisms of noncontact anterior cruciate ligament injury
    Yohei Shimokochi
    Osaka University of Health and Sport Sciences, Sennan gun, Osaka, Japan
    J Athl Train 43:396-408. 2008
    ....

Research Grants5

  1. Hormone Mediated Knee Joint Laxity and Neuromechanics
    SANDRA SHULTZ; Fiscal Year: 2009
    ....
  2. Hormone Mediated Knee Joint Laxity and Neuromechanics
    SANDRA SHULTZ; Fiscal Year: 2006
    ....
  3. Hormone Mediated Knee Joint Laxity and Neuromechanics
    SANDRA SHULTZ; Fiscal Year: 2007
    ....
  4. Hormone Mediated Knee Joint Laxity and Neuromechanics
    SANDRA SHULTZ; Fiscal Year: 2007
    ..abstract_text> ..