Gluteal muscle forces and footstrike pattern during running

NewsBot · Aug 9, 2017

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Changes in gluteal muscle forces with alteration of footstrike pattern during running
Charles Nathan Vannatta et al
Gait and Posture; Article in Press

Highlights
•Changing to a forefoot strike alters gluteal muscle forces and hip kinematics.
•Gluteus medius/minimus forces were reduced while gluteus maximus forces increased.
•Peak hip internal rotation and adduction angles were reduced.
•A FFS running pattern may have positive benefits for certain RRIs.
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Gait retraining is a common form of treatment for running related injuries. Proximal factors at the hip have been postulated as having a role in the development of running related injuries. How altering footstrike affects hip muscles forces and kinematics has not been described. Thus, we aimed to quantify differences in hip muscle forces and hip kinematics that may occur when healthy runners are instructed to alter their foot strike pattern from their habitual rear-foot strike to a forefoot strike. This may gain insight on the potential etiology and treatment methods of running related lower extremity injury. Twenty-five healthy female runners completed a minimum of 10 running trials in a controlled laboratory setting under rear-foot strike and instructed forefoot strike conditions. Kinetic and kinematic data were used in an inverse dynamic based static optimization to estimate individual muscle forces during running. Within subject differences were investigated using a repeated measures multi-variate analysis of variance. Peak gluteus medius and minimus and hamstring forces were reduced while peak gluteus maximus force was increased when running with an instructed forefoot strike pattern. Peak hip adduction, hip internal rotation, and heel-COM distance were also reduced. Therefore, instructing habitual rearfoot strike runners to run with a forefoot strike pattern resulted in changes in peak gluteal and hamstring muscle forces and hip kinematics. These changes may be beneficial to the development and treatment of running related lower extremity injury.
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Admin2 · Aug 9, 2017

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