Trent J Herda

Summary

Affiliation: University of Oklahoma
Country: USA

Publications

  1. doi request reprint Acute effects of static versus dynamic stretching on isometric peak torque, electromyography, and mechanomyography of the biceps femoris muscle
    Trent J Herda
    Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA
    J Strength Cond Res 22:809-17. 2008
  2. doi request reprint The consistency of ordinary least-squares and generalized least-squares polynomial regression on characterizing the mechanomyographic amplitude versus torque relationship
    Trent J Herda
    Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019, USA
    Physiol Meas 30:115-28. 2009
  3. doi request reprint Reliability of absolute versus log-transformed regression models for examining the torque-related patterns of response for mechanomyographic amplitude
    Trent J Herda
    Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019 6081, USA
    J Neurosci Methods 179:240-6. 2009
  4. doi request reprint An examination of innervation zone movement with increases in isometric torque production
    Jason M Defreitas
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, Norman, OK 73019, USA
    Clin Neurophysiol 119:2795-9. 2008
  5. doi request reprint Reliability of mechanomyographic amplitude and mean power frequency during isometric step and ramp muscle actions
    Trent J Herda
    Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019 6081, USA
    J Neurosci Methods 171:104-9. 2008
  6. doi request reprint Acute effects of a thermogenic nutritional supplement on energy expenditure and cardiovascular function at rest, during low-intensity exercise, and recovery from exercise
    Eric D Ryan
    Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA
    J Strength Cond Res 23:807-17. 2009
  7. doi request reprint Effects of creatine monohydrate and polyethylene glycosylated creatine supplementation on muscular strength, endurance, and power output
    Trent J Herda
    Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA
    J Strength Cond Res 23:818-26. 2009
  8. doi request reprint Passive properties of the muscle-tendon unit: the influence of muscle cross-sectional area
    Eric D Ryan
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, HHC Room 12, Norman, Oklahoma 73019 6081, USA
    Muscle Nerve 39:227-9. 2009
  9. doi request reprint Gender differences in musculotendinous stiffness and range of motion after an acute bout of stretching
    Katherine M Hoge
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA
    J Strength Cond Res 24:2618-26. 2010
  10. doi request reprint Electrode placement over the innervation zone affects the low-, not the high-frequency portion of the EMG frequency spectrum
    Travis W Beck
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, HHC Room 104, Norman, OK 73019 6081, United States
    J Electromyogr Kinesiol 19:660-6. 2009

Detail Information

Publications24

  1. doi request reprint Acute effects of static versus dynamic stretching on isometric peak torque, electromyography, and mechanomyography of the biceps femoris muscle
    Trent J Herda
    Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA
    J Strength Cond Res 22:809-17. 2008
    ..Overall, an acute bout of dynamic stretching may be less detrimental to muscle strength than static stretching for the hamstrings...
  2. doi request reprint The consistency of ordinary least-squares and generalized least-squares polynomial regression on characterizing the mechanomyographic amplitude versus torque relationship
    Trent J Herda
    Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019, USA
    Physiol Meas 30:115-28. 2009
    ..Future studies should examine alternative methods for improving the consistency and reliability of the patterns of response for the MMG(RMS) versus isometric torque relationship...
  3. doi request reprint Reliability of absolute versus log-transformed regression models for examining the torque-related patterns of response for mechanomyographic amplitude
    Trent J Herda
    Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019 6081, USA
    J Neurosci Methods 179:240-6. 2009
    ..Thus, the log-transformed MMG(RMS) versus TQ relationships may offer an attractive alternative method for reliably quantifying and tracking changes in the TQ-related patterns of response for MMG(RMS) on a subject-by-subject basis...
  4. doi request reprint An examination of innervation zone movement with increases in isometric torque production
    Jason M Defreitas
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, Norman, OK 73019, USA
    Clin Neurophysiol 119:2795-9. 2008
    ....
  5. doi request reprint Reliability of mechanomyographic amplitude and mean power frequency during isometric step and ramp muscle actions
    Trent J Herda
    Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019 6081, USA
    J Neurosci Methods 171:104-9. 2008
    ..36 to 0.80, while the SEM (% of mean) ranged from 14.9 to 33.9% and 6.9 to18.9% for MMG RMS and MMG MPF, respectively. Thus, MMG RMS and MMG MPF demonstrated reliability that was comparable to that of the surface electromyographic signal...
  6. doi request reprint Acute effects of a thermogenic nutritional supplement on energy expenditure and cardiovascular function at rest, during low-intensity exercise, and recovery from exercise
    Eric D Ryan
    Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA
    J Strength Cond Res 23:807-17. 2009
    ..These results suggested that the combination of thermogenic ingredients in this nutritional supplement may be useful to help maintain a negative caloric balance but may not influence substrate use or perceived exertion...
  7. doi request reprint Effects of creatine monohydrate and polyethylene glycosylated creatine supplementation on muscular strength, endurance, and power output
    Trent J Herda
    Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA
    J Strength Cond Res 23:818-26. 2009
    ..Thus, PEG creatine may have ergogenic effects that are comparable to those of CM, but with a smaller dose of creatine...
  8. doi request reprint Passive properties of the muscle-tendon unit: the influence of muscle cross-sectional area
    Eric D Ryan
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, HHC Room 12, Norman, Oklahoma 73019 6081, USA
    Muscle Nerve 39:227-9. 2009
    ..05; r = 0.765). Since passive stiffness and the ability to absorb passive energy decreases with many diseases, these findings may support the need to maintain or increase muscle CSA...
  9. doi request reprint Gender differences in musculotendinous stiffness and range of motion after an acute bout of stretching
    Katherine M Hoge
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA
    J Strength Cond Res 24:2618-26. 2010
    ..Practitioners may want to consider the possible gender differences in passive stretching responses and that increases in ROM may not always reflect decreases in MTS...
  10. doi request reprint Electrode placement over the innervation zone affects the low-, not the high-frequency portion of the EMG frequency spectrum
    Travis W Beck
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, HHC Room 104, Norman, OK 73019 6081, United States
    J Electromyogr Kinesiol 19:660-6. 2009
    ..Thus, these findings indicated that electrode placement over the IZ affected primarily the low-, rather than the high-frequency portion of the EMG frequency spectrum...
  11. doi request reprint The time course of musculotendinous stiffness responses following different durations of passive stretching
    Eric D Ryan
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019 6081, USA
    J Orthop Sports Phys Ther 38:632-9. 2008
    ..Repeated-measures experimental design...
  12. doi request reprint Acute effects of passive stretching on the electromechanical delay and evoked twitch properties
    Pablo B Costa
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, OK, USA
    Eur J Appl Physiol 108:301-10. 2010
    ..These results may help to explain the mechanisms underlying the stretching-induced force deficit that have been reported as either "mechanical" or "electrical" in origin...
  13. doi request reprint Innervation zone location of the biceps brachii, a comparison between genders and correlation with anthropometric measurements
    Jason M Defreitas
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019, USA
    J Electromyogr Kinesiol 20:76-80. 2010
    ..The shift in IZ location with changes in elbow joint angle was not, however, related to height, weight, or humerus length...
  14. doi request reprint Do practical durations of stretching alter muscle strength? A dose-response study
    Eric D Ryan
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019 6081, USA
    Med Sci Sports Exerc 40:1529-37. 2008
    ....
  15. ncbi request reprint Mechanomyographic amplitude and mean power frequency responses during isometric ramp vs. step muscle actions
    Eric D Ryan
    Department of Health and Exercise Science, Biophysics Laboratory, University of Oklahoma, Norman, OK 73019, USA
    J Neurosci Methods 168:293-305. 2008
    ..Overall, these findings indicated that the torque-related patterns of responses for MMG(RMS) and MMG(MPF) were different among subjects (i.e., inter-individual variability) and were muscle- (VL vs. RF) and mode-specific (ramp vs. step)...
  16. ncbi request reprint Inter-individual variability in the torque-related patterns of responses for mechanomyographic amplitude and mean power frequency
    Eric D Ryan
    Department of Health and Exercise Science, Biophysics Laboratory, University of Oklahoma, 1401 Asp Avenue, Norman, OK 73019 6081, USA
    J Neurosci Methods 161:212-9. 2007
    ..Therefore, future studies should examine the individual patterns of response to draw conclusions about motor control strategies...
  17. ncbi request reprint Effects of creatine loading on electromyographic fatigue threshold in cycle ergometry in college-age men
    Ashley A Walter
    Department of Health and Exercise Science, University of Oklahoma, Norman, OK, USA
    Int J Sport Nutr Exerc Metab 18:142-51. 2008
    ..In addition, a significant increase (p = .009) in weight was observed in the Cr group. These data suggest that there was a minimal influence of Cr loading on EMG FT for the participants in this study...
  18. doi request reprint Determining the minimum number of passive stretches necessary to alter musculotendinous stiffness
    Eric D Ryan
    Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma 73019 6081, USA
    J Sports Sci 27:957-61. 2009
    ..These findings suggest that two 30-s bouts of constant-torque passive stretching may be necessary to cause a significant decrease in musculotendinous stiffness of the plantar flexor muscles...
  19. pmc Acute effects of a thermogenic nutritional supplement on cycling time to exhaustion and muscular strength in college-aged men
    Ashley A Walter
    Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA
    J Int Soc Sports Nutr 6:15. 2009
    ..The purpose of the present study was to examine the acute effects of a thermogenic nutritional supplement containing caffeine, capsaicin, bioperine, and niacin on muscular strength and endurance performance...
  20. doi request reprint A noninvasive, log-transform method for fiber type discrimination using mechanomyography
    Trent J Herda
    Department of Health and Exercise Science, Biophysics Laboratory, University of Oklahoma, Norman, Oklahoma, USA
    J Electromyogr Kinesiol 20:787-94. 2010
    ..The lower b coefficients for the AT group in the MMG(RMS) patterns may have reflected fiber area-related differences in motor unit activation strategies...
  21. pmc Effects of creatine loading on electromyographic fatigue threshold during cycle ergometry in college-aged women
    Abbie E Smith
    Metabolic and Body Composition Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019, USA
    J Int Soc Sports Nutr 4:20. 2007
    ..2 kg +/- 0.2 kg). These findings suggest that 5 days of Cr loading in women may be an effective strategy for delaying the onset of neuromuscular fatigue during cycle ergometry...
  22. ncbi request reprint Time and frequency domain responses of the mechanomyogram and electromyogram during isometric ramp contractions: a comparison of the short-time Fourier and continuous wavelet transforms
    Eric D Ryan
    Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, Norman, OK 73019 6081, USA
    J Electromyogr Kinesiol 18:54-67. 2008
    ..In addition, although the STFT frequency patterns were more pronounced than the CWT, both algorithms produced similar time-frequency representations for tracking changes in MMG or EMG frequency...
  23. doi request reprint Effects of two modes of static stretching on muscle strength and stiffness
    Trent J Herda
    Biomechanics Laboratory, Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, KS, USA
    Med Sci Sports Exerc 43:1777-84. 2011
    ....