| dc.description.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
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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. | |
