التفاصيل البيبلوغرافية
| العنوان: |
INERTIAL LOADING DURING GAIT EVOKES UNIQUE NEUROMUSCULAR ADAPTATIONS IN OLD ADULTS. |
| المؤلفون: |
Powell, Douglas1 powelld@utpb.edu, DeVita, Paul2, Hortobagyi, Tibor2 |
| المصدر: |
Perceptual & Motor Skills. Dec2008, Vol. 107 Issue 3, p881-892. 12p. 4 Charts, 2 Graphs. |
| مصطلحات موضوعية: |
*MUSCLES, *NEUROMUSCULAR system, *ELECTROMYOGRAPHY, *DYNAMICS, *KINEMATICS, *GAIT in humans, *MOTOR ability research |
| مستخلص: |
This study examined the neuromuscular adaptations of young and old adults in response to a challenge to balance during gait. 12 young (22.2 ± 2.0 yr.) and 10 old adults (78.8 ± 6.3 yr.) performed five level walking trials with and without a challenge to balance which consisted of adding a load bilaterally to the participants' ankles and increasing gait speed (1.5 m/sec. and 1.7 m/sec.). Onset, duration, and amplitude of muscle activity in the vastus lateralis, rectus lemons, biceps fernoris, and semimembranosus were calculated. Old adults responded to the added load by increasing the activation intensity of their vastus lateralis and semimemsbranosus disproportionately when compared with young adults. Also, old adults activated their knee flexors earlier and all muscles for a longer period of time than young adults. These findings suggest old adults alter both magnitude of activation and duration of lower extremity musculature in response to increased inertial and velocity demands, and these response characteristics differ from those of young adults. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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