Geoffrey A Power

Summary

Affiliation: University of Western Ontario
Country: Canada

Publications

  1. pmc Increased residual force enhancement in older adults is associated with a maintenance of eccentric strength
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, Ontario, Canada
    PLoS ONE 7:e48044. 2012
  2. doi Residual force enhancement following eccentric induced muscle damage
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, Canada
    J Biomech 45:1835-41. 2012
  3. doi Anconeus motor unit number estimates using decomposition-based quantitative electromyography
    Daniel E S Stevens
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, London, Ontario, Canada
    Muscle Nerve 50:52-9. 2014
  4. doi Power loss is greater in old men than young men during fast plantar flexion contractions
    Brian H Dalton
    Canadian Centre for Activity and Aging, School of Kinesiology, The University of Western Ontario, London, Ontario, Canada
    J Appl Physiol (1985) 109:1441-7. 2010
  5. doi Motor unit survival in lifelong runners is muscle dependent
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, Ontario, Canada
    Med Sci Sports Exerc 44:1235-42. 2012
  6. pmc Power loss is greater following lengthening contractions in old versus young women
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, Canada
    Age (Dordr) 34:737-50. 2012
  7. doi Reproducibility of velocity-dependent power: before and after lengthening contractions
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, ON N6A 5B9, Canada
    Appl Physiol Nutr Metab 36:626-33. 2011
  8. doi The age-related slowing of voluntary shortening velocity exacerbates power loss during repeated fast knee extensions
    Brian H Dalton
    Canadian Centre for Activity and Aging, School of Kinesiology, The University of Western Ontario, London, Ontario, Canada
    Exp Gerontol 47:85-92. 2012
  9. pmc Delayed recovery of velocity-dependent power loss following eccentric actions of the ankle dorsiflexors
    Geoffrey A Power
    Canadian Center for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, London, ON, Canada N6G 1H1
    J Appl Physiol (1985) 109:669-76. 2010
  10. doi The genu effect on plantar flexor power
    Brian H Dalton
    School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, Canadian Centre for Activity and Aging, London, ON, Canada
    Eur J Appl Physiol 113:1431-9. 2013

Detail Information

Publications15

  1. pmc Increased residual force enhancement in older adults is associated with a maintenance of eccentric strength
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, Ontario, Canada
    PLoS ONE 7:e48044. 2012
    ..Additionally, as indicated by the greater passive force enhancement, these mechanisms may be related to increased muscle series elastic stiffness in old age...
  2. doi Residual force enhancement following eccentric induced muscle damage
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, Canada
    J Biomech 45:1835-41. 2012
    ..Thus, active force of cross-bridges is decreased because of impaired excitation-contraction coupling but force generated during stretch remains intact because force contribution from stretched sarcomeric structures is less impaired...
  3. doi Anconeus motor unit number estimates using decomposition-based quantitative electromyography
    Daniel E S Stevens
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, London, Ontario, Canada
    Muscle Nerve 50:52-9. 2014
    ..Unique features of the anconeus may permit MUNEs at high muscle activation levels...
  4. doi Power loss is greater in old men than young men during fast plantar flexion contractions
    Brian H Dalton
    Canadian Centre for Activity and Aging, School of Kinesiology, The University of Western Ontario, London, Ontario, Canada
    J Appl Physiol (1985) 109:1441-7. 2010
    ..01). Despite a better maintenance in isometric MVC torque production, the weaker and slower contracting triceps surae of the old was more fatigable than the young during fast dynamic efforts with an unconstrained velocity...
  5. doi Motor unit survival in lifelong runners is muscle dependent
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, Ontario, Canada
    Med Sci Sports Exerc 44:1235-42. 2012
    ..However, it is unknown if this finding is the result of long-term activation of the specifically exercised motoneuron pool (i.e., tibialis anterior) or an overall systemic neuroprotective effect of high levels of physical activity...
  6. pmc Power loss is greater following lengthening contractions in old versus young women
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, Canada
    Age (Dordr) 34:737-50. 2012
    ..These results indicate that older women are more susceptible to power loss than young following lengthening contractions, likely owing to a greater impairment in calcium kinetics...
  7. doi Reproducibility of velocity-dependent power: before and after lengthening contractions
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, ON N6A 5B9, Canada
    Appl Physiol Nutr Metab 36:626-33. 2011
    ..The high reliability of this measure is encouraging and suggests that the isotonic mode can be used in various settings to track group changes before and after training and following fatigue and lengthening contractions...
  8. doi The age-related slowing of voluntary shortening velocity exacerbates power loss during repeated fast knee extensions
    Brian H Dalton
    Canadian Centre for Activity and Aging, School of Kinesiology, The University of Western Ontario, London, Ontario, Canada
    Exp Gerontol 47:85-92. 2012
    ..Furthermore, the importance of this factor is masked when velocity is constrained (isovelocity) and fatigue is dependent primarily upon slow torque generation...
  9. pmc Delayed recovery of velocity-dependent power loss following eccentric actions of the ankle dorsiflexors
    Geoffrey A Power
    Canadian Center for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, London, ON, Canada N6G 1H1
    J Appl Physiol (1985) 109:669-76. 2010
    ....
  10. doi The genu effect on plantar flexor power
    Brian H Dalton
    School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, Canadian Centre for Activity and Aging, London, ON, Canada
    Eur J Appl Physiol 113:1431-9. 2013
    ..Thus, the gastrocnemeii are not only a major contributor to plantar flexion torque, but also critical for modifying loaded shortening velocity and ultimately power production...
  11. doi The effect of knee joint angle on plantar flexor power in young and old men
    Brian H Dalton
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, Ontario, Canada School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada Department of Human Physiology, University of Oregon, Eugene, OR, United States Electronic address
    Exp Gerontol 52:70-6. 2014
    ..3±9.0% MVC, whereas the old men produced peak power at 54.8±7.9% MVC. These data indicate that the young, who have faster contracting muscles compared with the old, can rely more on velocity than torque for generating maximal power...
  12. doi Motor unit number estimates in masters runners: use it or lose it?
    Geoffrey A Power
    Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, Ontario, Canada
    Med Sci Sports Exerc 42:1644-50. 2010
    ..This has not previously been examined in humans...
  13. doi Peak power is reduced following lengthening contractions despite a maintenance of shortening velocity
    Geoffrey A Power
    a Canadian Centre for Activity and Aging, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, ON N6G 2M3, Canada
    Appl Physiol Nutr Metab 38:1196-205. 2013
    ..Unaccustomed lengthening contractions decreased power preferentially at higher loads, whereas peak power was reduced minimally owing to maintenance of maximal shortening velocity. ..
  14. ncbi Neural and muscular determinants of dorsiflexor weakness in chronic stroke survivors
    Cliff S Klein
    Department of Physical Therapy, University of Toronto, Toronto, ON, Canada, and the Toronto Rehabilitation Institute, Toronto, ON, Canada
    Motor Control 17:283-97. 2013
    ..Our findings indicate that dorsiflexor weakness in mobile stroke survivors is not explained by atrophy or reduced torque generating capacity suggesting an important role for central factors. ..
  15. ncbi Neural and muscular determinants of dorsiflexor weakness in chronic stroke survivors
    Cliff S Klein
    Department of Physical Therapy, University of Toronto, Toronto, ON, Canada
    Motor Control 17:283-97. 2013
    ..Our findings indicate that dorsiflexor weakness in mobile stroke survivors is not explained by atrophy or reduced torque generating capacity suggesting an important role for central factors. ..