Most ski boot-binding complexes have a positive ramp angle. This angle is not regulated or reported in the alpine ski industry, but may influence skier balance and pressure control. Therefore joint coordination during a dynamic ski squat task with increasing boot ramp angle (0°, 1°, 2°) in alpine skiers (n=19) was investigated. Average joint coupling angles were significantly different between barefoot and ski conditions, as well as between the three ramp angles during the upward phase of a squat. The percentage of squat with uncoordinated knee-ankle joint movements tended to increase in ski conditions versus barefoot conditions, and coordinated hip-knee movement was reduced with alpine boot-binding-ski complexes. These differences in joint coordination and average coupling angles may impact skier balance and pressure control across the ski while skiing.
Moore, Stephanie R.; Kröll, Josef; Clarke, Sarah B.; Strutzenberger, Gerda; and Jensen, Randall L.
"JOINT COORDINATION ADAPTATIONS TO AN IMPLEMENTED RAMP ANGLE IN RECREATIONAL ALPINE SKIERS,"
ISBS Proceedings Archive: Vol. 36
, Article 35.
Available at: https://commons.nmu.edu/isbs/vol36/iss1/35