![]() ![]() 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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