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Effects of ankle fatigue on functional reflex activity during gait perturbations in young and elderly men

Effects of ankle fatigue on functional reflex activity during gait perturbations in young and elderly men

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GRANACHER, Urs, Markus GRUBER, Dominik FÖRDERER, Dieter STRASS, Albert GOLLHOFER, 2010. Effects of ankle fatigue on functional reflex activity during gait perturbations in young and elderly men. In: Gait & Posture. 32(1), pp. 107-112. ISSN 0966-6362. eISSN 1879-2219. Available under: doi: 10.1016/j.gaitpost.2010.03.016

@article{Granacher2010-05Effec-12785, title={Effects of ankle fatigue on functional reflex activity during gait perturbations in young and elderly men}, year={2010}, doi={10.1016/j.gaitpost.2010.03.016}, number={1}, volume={32}, issn={0966-6362}, journal={Gait & Posture}, pages={107--112}, author={Granacher, Urs and Gruber, Markus and Förderer, Dominik and Strass, Dieter and Gollhofer, Albert} }

Gruber, Markus Förderer, Dominik Gruber, Markus Effects of ankle fatigue on functional reflex activity during gait perturbations in young and elderly men 2011-07-06T13:39:48Z There is growing evidence that aging and muscle fatigue result in impaired postural reflexes in humans. Therefore, the objective of this study was to examine the effects of ankle fatigue on functional reflex activity (FRA) during gait perturbations in young and elderly men.<br />Twenty-eight young (27.0 ± 3.1 years, n = 14) and old (67.2 ± 3.7 years, n = 14) healthy active men participated in this study. Fatigue of the plantarflexors and dorsiflexors was induced by isokinetic contractions. Pre and post-fatigue, subjects were tested for their ability to compensate for decelerating gait perturbations while walking on a treadmill. Latency, FRA of lower extremity muscles and angular velocity of the ankle joint complex were analysed by means of surface electromyography and goniometry.<br />After the fatigue protocol, no significant main and interaction effects were detected for the parameter latency in m. tibialis anterior (TA). For both groups, a significant pre to post-test decrease in FRA in TA (p < .001) was observed coming along with increases in antagonist coactivity (p = .013) and maximal angular velocity of the ankle joint (p = .007). However, no significant group × test interactions were found for the three parameters.<br />Ankle fatigue has an impact on the ability to compensate for gait perturbations in young and elderly adults. However, no significant differences in all analysed parameters were detected between young and elderly subjects. These results may imply that age-related deteriorations in the postural control system do not specifically affect the ability to compensate for gait perturbations under fatigued condition. 2010-05 Gollhofer, Albert Strass, Dieter eng 2011-07-06T13:39:48Z Gait & Posture ; 32 (2010), 1. - pp. 107-112 deposit-license Granacher, Urs Strass, Dieter Förderer, Dominik Gollhofer, Albert Granacher, Urs

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