—Healthy runners who sustained an AT RRI within 1-year evaluation had significantly increased knee flexion and external moment arm at the knee at baseline measurement. Increased knee flexion reduced the EMA. AT RRI indicates Achilles tendon running-related injury; EMA, effective mechanical advantage—ratio between internal (r) and external (R) moment arms; GRF, resultant ground reaction force; r, agonist muscle moment arm; R, moment arm of the ground reaction force; α, maximum knee flexion during the stance phase of running—mean of group.

Citation: Journal of Applied Biomechanics 39, 4; 10.1123/jab.2022-0221