Comput Math Methods Med - Three-dimensional lower extremity joint loading in a carved ski and snowboard turn: a pilot study.

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Resumo

A large number of injuries to the lower extremity occur in skiing and snowboarding. Due to the difficulty of collecting 3D kinematic and kinetic data with high accuracy, a possible relationship between injury statistic and joint loading has not been studied. Therefore, the purpose of the current study was to compare ankle and knee joint loading at the steering leg between carved ski and snowboard turns. Kinetic data were collected using mobile force plates mounted under the toe and heel part of the binding on skies or snowboard (KISTLER). Kinematic data were collected with five synchronized, panning, tilting, and zooming cameras. An extended version of the Yeadon model was applied to calculate inertial properties of the segments. Ankle and knee joint forces and moments were calculated using inverse dynamic analysis. Results showed higher forces along the longitudinal axis in skiing and similar forces for skiing and snowboarding in anterior-posterior and mediolateral direction. Joint moments were consistently greater during a snowboard turn, but more fluctuations were observed in skiing. Hence, when comparing joint loading between carved ski and snowboard turns, one should differentiate between forces and moments, including the direction of forces and moments and the turn phase.

Resumo Limpo

larg number injuri lower extrem occur ski snowboard due difficulti collect d kinemat kinet data high accuraci possibl relationship injuri statist joint load studi therefor purpos current studi compar ankl knee joint load steer leg carv ski snowboard turn kinet data collect use mobil forc plate mount toe heel part bind sky snowboard kistler kinemat data collect five synchron pan tilt zoom camera extend version yeadon model appli calcul inerti properti segment ankl knee joint forc moment calcul use invers dynam analysi result show higher forc along longitudin axi ski similar forc ski snowboard anteriorposterior mediolater direct joint moment consist greater snowboard turn fluctuat observ ski henc compar joint load carv ski snowboard turn one differenti forc moment includ direct forc moment turn phase

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