Abstract
871 Plyometric exercises which have similar movement patterns and immediately follow strength training exercise, may optimize the training effect through increased motor neuron excitation and enhanced nervous system involvement. This study examined mean integrated electromyographic (I-EMG) values, mean and peak ground reaction forces, for a set of five medicine ball power drops (MBPD) and a set of high load bench presses followed immediately by five MBPD (COM) during a single testing session. Approximately 30% of a previously determined 1 RM bench press was used for the MBPD and COM. Exercises were performed with the subject lying supine on a nonupadded bench with the hips and knees flexed so the feet did not contact any surface. The bench was mounted to a 3/4" thick aluminum platform (.76 × 1.0 m) bolted directly to a force plate (OR6û7û2000, AMTI, Watertown, MA) to determine vertical ground reaction forces. All ground reaction forces were limited to the surface area of the bench. Surface electrode EMG data of the pectoralis major and the long head of the triceps were recorded at 200 Hz. Exercise order was randomly determined for 10 female Division I College Basketball players (age = 19.9±2.4 yr; Height = 1.81±.08 m; Mass = 75.6±10.2 kg). A one factor repeated measures ANOVA revealed no differences in I-EMG of the pectoralis major (COM = 1.93±.77 Vs MBPD = 2.22±1.09) or the triceps (COM = 2.71±.90 Vs MBPD = 2.23±.57). Likewise there were no differences for peak (COM = 471.3±125.0N Vs MBPD = 414.1±117.7N) or mean ground reaction forces (COM = 85.5±19.5N Vs MBPD = 78.5±17.5N). Results of the present study counter suggestions that an advantage, resulting in neurogenic changes, is accrued via complex training. Likewise, there is no disadvantage of performing high load strength training and plyometric exercises in complex pairs.
Published Version
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