![]() Increases in step frequency of 5% above preferred, regardless of foot strike pattern, may also lower peak AT stress and strain. Our results suggest that a rearfoot pattern may reduce AT stress, strain, and strain rate. ![]() Rearfoot strike patterns had less peak AT stress (P.05) between step frequencies within each foot strike condition. Nineteen female runners performed running trials under six conditions including rearfoot strike and forefoot strike patterns at their preferred cadence, +5%, and -5% preferred cadence. Our purpose was to examine the effects of foot strike pattern and step frequency on AT stress and strain during running utilizing muscle forces based on a musculoskeletal model and subject specific ultrasound-derived AT cross sectional area. The AT withstands high magnitudes of stress during running which may contribute to injury. ![]() ![]() Achilles tendon (AT) injuries are common in runners. ![]()
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