Summary The purpose of the present study was to investigate the long-term
effects of two different stretching techniques on the rangeofmotion(ROM)and on
drop jump(DJ).DJ scores were assessed by means of a contact mat connected to a
digital timer.ROM was measured by use of agoniometer .Thetraining was carried out
four times a week for 6 weeks on 10 subjects as passive static stretching(SS),and on
9 subjects as contract–relax PNF(CR PNF)stretching. The remaining nine subjects
did not perform any exercises(control group).One-way Analysis of Variance(ANOVA)
results indicated that the differences among groups on DJ were not statistically
different (F(2,27) ¼ .41, p 4.05). ROM values were significantly higher for both
stretching groups, while no change was observed for the control group.In
conclusion, static an dproprioceptive neuromuscular facilitation(PNF)stretching
techniques improved the ROM, but neither of the stretching exercises had any
statistically significant effect on the DJ scores.
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