Muscle Activity and Fatigue During Push-Ups Performed by Women: An Electromyographic and Videographic Analysis of 15 Muscles.
Annual rept. 5 Dec 94-1 Aug 95,
WALTER REED ARMY MEDICAL CENTER WASHINGTON DC
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The purpose of this study was to establish the firing patterns of 15 muscles in the upper extremtry and shoulder girdle of healthy female subjects during performance of the pushup. Dynamic, fine wire intramuscular electromyography was carried out in 67 healthy female volunteers. 30 women had barely passed the pushup event on the APFT within the past 6 months. 37 women had achieved a maximal or near maximal score on the APFT pushup event. 12 muscles were evaluated in all participants. 15 subjects in each group returned for testing of an additional 3 muscles. The electromyographic activity was synchronized with video. The second, third and fourth pushups in each of the narrow, middle and wide hand positions were analyzed. Differences in firing patterns between hand placements within the groups is presented. Differences in firing patterns between the minimal and maximal groups was also determined. Pre and post fatigue median frequency rates of change for each muscle were assessed. Comparisons between the minimal and maximal groups were determined. Analysis of demographic and anthropometric measurements revealed no significant differences between the groups.
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- Stress Physiology
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