By Jordana Bieze Foster
Foot position during landing may contribute to the risk of lateral ankle sprains as well as anterior cruciate ligament (ACL) injuries, according to separate studies from Hokkaido University in Sapporo, Japan, and Stanford University in California.
The Japanese researchers analyzed single-leg landings in 18 volunteers under neutral, toe-in, and toe-out conditions. Ankle inversion angle, angular velocity, and moment—risk factors for ankle sprain—were significantly higher for the toe-in landings than the other two conditions; eversion angle and moment were highest during toe-out landings. The findings were epublished in December by the Journal of Sport Rehabilitation.
Meanwhile, the Stanford researchers analyzed double-leg landings in 20 volunteers and found toe-in landings were associated with significantly greater hip adduction, knee internal rotation angle, and peak abduction angle—all risk factors for ACL injury—than neutral or toe-out foot positions. The findings were published in the December issue of the Journal of Experimental Orthopaedics.
Koshino Y, Ishido T, Yamanaka M, et al. Toe-in landing increases the ankle inversion angle and moment during single-leg landing: Implications in the prevention of lateral ankle sprains. J Sport Rehabil 2016 Dec 19. [Epub ahead of print]
Tran AA, Gatewood C, Harris AH, et al. The effect of foot landing position on biomechanical risk factors associated with anterior cruciate ligament injury. J Exp Orthop 2016;3(1):13.