The purpose of the study was to find out the relationship of Javelin throw performance on peak vertical Ground Reaction Force (GRFv) at last third step, at penultimate step and at delivery step and release velocity at the instant of release. Twelve national level male javelin throwers performed six trials of javelin throw with adequate rest between trials. The Qualisys 3D mocap system were synchronized with four force plates to capture the delivery phase. The data were analyzed using Pearson product moment correlation followed by multiple linear regression. The javelin throw performance had a significant positive linear correlation with peak vertical GRF at last third step, at penultimate step, at delivery step and release velocity at delivery phase. The multiple linear regression revealed that peak GRFv at last third step was the predictor of javelin throw performance.
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