biostudies-literatureTu JNatural Sciences and Engineering Research Council of Canada100978https://www.ebi.ac.uk/biostudies/studies/S-EPMC11809199biostudies-literatureUnknown14<h4>Purpose</h4>This study aimed to evaluate the relationship between peak tibial acceleration and peak ankle joint contact forces in response to stride length manipulation during level-ground running.<h4>Methods</h4>Twenty-seven physically active participants ran 10 trials at preferred speed in each of 5 stride length conditions: preferred, ±5%, and ±10% of preferred stride length. Motion capture, force platform, and tibial acceleration data were directly measured, and ankle joint contact forces were estimated using an inverse-dynamics-based static optimization routine.<h4>Results</h4>In general, peak axial tibial accelerations (p < 0.001) as well as axial (p < 0.001) and resultant (p < 0.001) ankle joint contact forces increased with stride length. When averaged within the 10 strides of Journal of sport and health scienceTibial acceleration alone is not a valid surrogate measure of tibial load in response to stride length manipulation.PMC11809199CGS D\u2013534891-2019RGPIN 02404-2021Bruce OLTu JEdwards WBfalseTibial acceleration alone is not a valid surrogate measure of tibial load in response to stride length manipulation.<h4>Purpose</h4>This study aimed to evaluate the relationship between peak tibial acceleration and peak ankle joint contact forces in response to stride length manipulation during level-ground running.<h4>Methods</h4>Twenty-seven physically active participants ran 10 trials at preferred speed in each of 5 stride length conditions: preferred, ±5%, and ±10% of preferred stride length. Motion capture, force platform, and tibial acceleration data were directly measured, and ankle joint contact forces were estimated using an inverse-dynamics-based static optimization routine.<h4>Results</h4>In general, peak axial tibial accelerations (p < 0.001) as well as axial (p < 0.001) and resultant (p < 0.001) ankle joint contact forces increased with stride length. When averaged within the 10 strides of 2024-01-01T00:00:00Z2024 Sep2025-04-04T23:56:35.974Z2025-04-04T23:56:35.974ZS-EPMC118091993923706410.1016/j.jshs.2024.100978