The Effect of Ankle Strapping on the Kinetics the Kinematics of the Lower Extremities and Trunk and the Knee Joint Reaction Moments Experienced during Drop Landings
Cardiff Metropolitan University
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The purpose of this study was to investigate the effect of ankle strapping (Proline, Sports & Medical supports; Lace up ankle brace) on the kinematics, kinetics and knee joint reaction moments experienced during vertical landings. Male recreational athletes (n = 3) performed drop landings from a solid platform (height = 0.620 m). Five trials were collected without strapping and five with ankle strapping worn on both ankles, for each participant. Sagital plane kinematic data (50 Hz) md ground reaction force data (1000 FIz) were collected simultaneously, Knee joint reaction moments (50 Hz) were calculated using quasi-static analysis from the synchronised (L.E.D timing lights) data. Intra-subject kinematic findings showed a less plantar flexed discrete ankle angle, and more flexed knee and hip angles, at touch down for strapped trials. Greater discrete maximum joint flexions of the ankle the knee and the hip we¡e also apparent, The total joint flexion for the three joints, from touch down to maximum flexion, revealed a minirnal, but consistent, smaller amount of total joint flexion for trials in which strapping was worn. There was no apparent difference in peak force, loading rate or knee joint reaction moments as a result of the use of ankle strapplng. The possible injury implications of the observed kinematic differences under higher loading conditions require further research. A sampling rate of 50 Hz was reported to be insuffrcient for comprehensive investigation ofjoint moments during the impact phase of drop landings.
BSc (Hons) Sport, P.E. and Recreation
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