Abstract

The effect of two prestretch conditioning programs, using high (H) and low (L) intensity prestretch stimulus, was studied. Twenty four male students were assigned to three (n=8 in each) groups: H,L and control (C). Using a novel apparatus designed specifically for this particular mode, prestretching of lower limb muscles was effected via either dropping down before contacting the jump step (group H), or preparatory countermovement only (group L). Two performance criteria - Sargent jump and peak power output as well as four anthropometric measurements were recorded before and after the conditioning period which lasted for eight weeks. Statistical analysis revealed a significant intragroup improvement in the performance criteria. Group H scored significantly higher than group L in the Sargent jump test. No significant changes either between or within groups, in the anthropometric measurements, took place. Findings indicate that prestretch conditioning which combines a high intensity prestretch stimulus with a proper overloading protocol is likely to be highly effective for athletes. The significance of involvement of several intervening variables is discussed. Verf.-Referat