A Comparison of the Effects of Short-Term Plyometric and Resistance Training on Lower Body Muscular Performance

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The purpose of this study was to compare effects of short-term plyometric and resistance training on lower body muscular performance. A convenience sample of thirty males aged 21.3 ± 1.8 years, height 177.3 ± 9.4 cm, mass 80.0 ± 2.6 kg, body fat 16.1 ± 1.2 % participated in this investigation. Participants were grouped and participated in progressive plyometric (PLT) or resistance training (SRT) twice per week for eight consecutive weeks or a control (CNT) group that did not participate in any training. Performance tests were administered prior to and following the training period and included measures of high-speed muscular strength (standing long jump, vertical jump), low-speed muscular strength (one-repetition maximal back squat), running speed (20-meter sprint) and running agility (505 agility test agility test-Test). Analysis of variance followed by post hoc analyses was performed to determine significant differences between the groups. Significance set at p ≤ 0.05 for all analyses. Significant improvements were observed in the PLT group for standing long jump, vertical jump, and one-repetition maximal back squat compared to the CNT group, and for vertical jump as compared to the SRT group. Significant improvements were observed in the SRT group one-repetition maximal back squat compared to the CNT group. There were no differences observed between any of the groups for the 20-meter sprint or the 505 agility test following the training. These data indicate eight weeks of progressive plyometric training results in improvements in parameters of high and low-speed muscular strength with no appreciable change in speed or agility. Additionally, the improvement in low-speed muscular strength observed from 8-weeks of progressive plyometric training was comparable to the results observed from 8-weeks of progressive strength training.

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