Research Article

Variable Heights Influence Lower Extremity Biomechanics and Reactive Strength Index during Drop Jump: An Experimental Study of Male High Jumpers

Table 2

One-way repeated measure analysis of variance for variables during DJs.

S. no.VariablesMauchly’s sphericity testFPartial eta [2]

1vGRF0.00447.709≤0.0010.841
2vGRFep0.40327.577≤0.0010.754
3Hip extension moment0.0438.0590.0190.472
4Knee extension moment0.0053.7520.0230.294
5Ankle plantarflexion moment0.0280.840.4840.085
6Lower limbs’ support moment0.0362.5330.1190.22
7Eccentric power of the hip joint0.00632.686≤0.0010.784
8Eccentric power of the knee joint0.0142.591≤0.0010.826
9Eccentric power of the ankle joint0.48222.8190.0010.907
10Concentric power of the hip joint0.17412.9050.0010.589
11Concentric power of the knee joint0.0571.1790.3360.116
12Concentric power of the ankle joint0.0910.480.6990.051
13RSI0.1960.5850.630.061

vGRF: the peak of vertical ground reaction force; vGRFep: the peak of vertical ground reaction force in the extension phase; RSI: reactive strength index. indicates a significant difference, and bold is used to indicate it. The value of this index at the drop height of 0.3m, 0.45m, 0.6m, 0.75m is significantly different from each other.