Effects of resistance training on selected physiological parameters
Abstract
The literature presents contradictory statements concerning
the effectiveness of free weights, isokinetic devices and
plyometric exercises on the development of lower extremity power,
and lean body mass {Coyle, Feiring, Rotkis, Cote, Roby, Lee, &
Wilmore, 1981; Gettman, Cutler & Strathman, 1980; Pipes &
Wilmore, 1975; Promoli & Holt, 1979; Verhoshanski & Tatyan,
1983; and Scoles, 1978) . There is limited evidence in the
literature measuring the effectiveness of combining plyometrics
and various alternative resistance training devices.
The training effects of four experimental groups were
investigated; free weights (FW), Hydra-Fitness (HF), Hydra-
Fitness plus plyometrics (HFP), and free weights plus
plyometrics (FWP). Pre-training and post-training tests for the
lower extremity measured lean body mass, muscular peak power at
slow and fast speeds (60, and 180 degrees/second), powerendurance
and vertical jump power. Forty Physical Education
students were randomly assigned into four groups; free weights,
Hydra-Fitness, Hydra-Fitness plus plyometrics, and free weights
plus plyometrics. The intensity of each group was equated.
Subjects were trained three times per week for seven weeks. A 4
(groups) by 2 (tests) ANOVA with repeated measures on the last
factor (p<.05) was employed on pre and post training raw data.
Post-hoc technique (Scheffe' method) was employed when
significant interactions were found. All groups improved the lean
body mass, vertical jump, and power-endurance after training. There were no significant differences found between the four
training groups. Plyometrics in combination with free weights or
Hydra-Fitness appear to have a positive training effect on power.
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- Retrospective theses [1604]