رابطه برخي از پارامترهاي ايزوكينتيك در مفاصل مچ پا و زانو با حداكثر ارتفاع پرش عمودي

Relationship Between Some Isokinetic Parameters at Ankle and knee Joints with Maximum Vertical Jump Height

The main purpose of this study was to consider the relationship between some of the Isokinetic parameters at the ankle and knee with maximum height reaches during double and single legs vertical jump. 28 male students from department of physical education and sport sciences volunteered. Isokinetic parameters including of the knee and the ankle were measured by the use of Isokinetic Biodex dynamometer at the angular velocities of 60 and 180 (ｰ/s). Double and single leg vertical jump heights were assessed by the use of Sargent test. Pearson coefficient and multiple regressions were performed to test hypotheses (p<0.05). Significant relationships were found on most parameters at the knee and ankle at 60 an 180 degree per second except for angle to peak torque with double and single legs vertical jump (p<0.05). For double leg vertical jump, at 60 degree per second, the variance extracted in relation to predictor variables at the knee (predictor variables accounted for 65%, P=0/0001) and for the whole ankle (51ʹ/.of the variance, P^O/015). For single leg vertical jump, the whole ankle predictor variables accounted for 45% and for all ankle parameters R2=0/53, P=0/036 at 60 degree per second. The result of this study highlighted the importance of knee joint in double leg vertical jump and ankle joint in single leg vertical jump.