Rearfoot strikes more frequently apply combined knee valgus and tibial internal rotation moments than forefoot strikes in females during the early phase of cutting maneuvers
•GRFs acting at anterior or posterior to tibial axis rotates tibia oppositely.•Rearfoot strike often produced knee valgus and tibial internal rotation moments.•Rearfoot strike in cuttings potentially elevates the probability of ACL injury. Anterior cruciate ligament (ACL) injury often occurs during...
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Veröffentlicht in: | Gait & posture 2020-02, Vol.76, p.364-371 |
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Sprache: | eng |
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Zusammenfassung: | •GRFs acting at anterior or posterior to tibial axis rotates tibia oppositely.•Rearfoot strike often produced knee valgus and tibial internal rotation moments.•Rearfoot strike in cuttings potentially elevates the probability of ACL injury.
Anterior cruciate ligament (ACL) injury often occurs during deceleration maneuvers in sports. Combined knee valgus and tibial internal rotation (VL + IR) moments have been recognized as a risk leading to ACL injury; however, it is unknown how the foot strike pattern (forefoot or rearfoot strike) affects the occurrence rate of the aforementioned combined knee moments during cutting maneuvers.
To test the hypothesis that rearfoot strikes rather than forefoot strikes show a significantly higher occurrence rate of the combined VL + IR moments during the early stance phase of a cutting maneuver.
Twenty-four females performed 60° cutting maneuvers under rearfoot and forefoot strike conditions. Positional data of lower limb markers and ground reaction force (GRF) were collected. Knee varus/valgus and tibial internal/external rotation moments due to GRF were calculated and time-normalized (0–100 %) to the stance phase. The occurrence rates of combined VL + IR moments were compared between rearfoot and forefoot strike conditions throughout the stance (chi-squared test, p |
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ISSN: | 0966-6362 1879-2219 |
DOI: | 10.1016/j.gaitpost.2019.11.014 |