KINETIC ANALYSIS OF HORIZONTAL PLYOMETRIC EXERCISE INTENSITY

This study assessed the multi-planar kinetic characteristics of a variety of plyometric exercises that have a horizontal component. Ten men and ten women performed a variety of plyometric exercises including the double leg hop, standing long jump, single leg standing long jump, bounding, skipping, power skipping, cone hops and the hurdle hop (45.72 cm). Subjects also performed the countermovement jump. All plyometric exercises were performed on a force platform. Landing peak ground reaction forces (GRF) and rate of force development (RFD) were analyzed for three planes of movement. A number of differences were found between plyometric exercises. Quantification of plyometric exercises based on the analysis of GRF and RFD assists practitioners in the design of programs based on known intensity of these exercise

THE ROLE OF SHOE SOLE DUROMETER ON JUMPING KINETICS

This study investigated the relationship between shoe heel density (HD), toe density (TD) and the peak ground reaction force (GRF) and rate of force development (RFD) during jumping. This study also assessed the reliability of the durometer to assess shoe soles. Subjects included 12 men. Shoe HD and TD were assessed via durometer and kinetics were determined during the countermovement jump on a force platform. A Pearson bivariate correlation analysis was performed. Results reveal that HD was not correlated with GRF (r = -.22, p = .50) or RFD (r = -.14, p = .67). Similarly, TD was not correlated with GRF (r = -.29, p = .37) or RFD (r = -.28, p = .37). Intraclass correlation coefficients for the heel and toe durometer were .95 and .92, respectively. Jumping kinetics were not mediated by shoe sole characteristics, though the durometer was reliable for assessing shoe soles