| Autor: |
Madhavan, Sangeetha, Burkart, Sarah, Baggett, Gail, Nelson, Katie, Teckenburg, Trina, Zwanziger, Mike, Shields, Richard K. |
| Předmět: |
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| Zdroj: |
Journal of Aging & Physical Activity; Jul2009, Vol. 17 Issue 3, p327-343, 17p, 1 Diagram, 2 Charts, 5 Graphs |
| Abstrakt: |
Neuromuscular control strategies might change with age and predispose the elderly to knee-joint injury. The purposes of this study were to determine whether long latency responses (LLRs), muscle-activation patterns, and movement accuracy differ between the young and elderly during a novel single-limb-squat (SLS) task. Ten young and 10 elderly participants performed a series of resistive SLSs (∼0-30°) while matching a computer-generated sinusoidal target. The SLS device provided a 16% body-weight resistance to knee movement. Both young and elderly showed significant overshoot error when the knee was perturbed (p < .05). Accuracy of the tracking task was similar between the young and elderly (p = .34), but the elderly required more muscle activity than the younger participants (p < .05). The elderly group had larger LLRs than the younger group (p < .05). These results support the hypothesis that neuromuscular control of the knee changes with age and might contribute to injury. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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