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• W2807461772 abstract "Kinetics of running mechanics have been implicated in the development of bony and soft tissue injuries. Progressively heavier runners may be at increased risk for lower extremity injuries due to kinetic factors, but this has yet to be examined. The relationships between running kinetics and recent lower extremity injury among runners of different body sizes are not clear. PURPOSE: To determine the key kinetic characteristics of running gait among runners across the spectrum of body mass index (BMI in kg/ m2) values with and without recent history of lower extremity injuries. METHODS: Recreational competitive runners (N=278; 46.6% women; 34.8 ± 14.9 yr) were stratified into three BMI groups in kg/m2: healthy weight BMI<24.9, overweight BMI 25-30, obese BMI>30. A 3D motion tracking system and instrumented treadmill captured ground reaction forces (GRF) and loading rates at preferred running speed. BMI group comparisons were made using univariate analyses of variance covaried for running speed. Recent history of lower extremity bony and soft tissue injuries related to running was self-reported. Key variables included peak GRF and vertical instantaneous loading rate (VILR). Linear regressions were used to determine the relationship between BMI and VILR after accounting for running speed; models included age, sex, running speed, GRF and VILR. RESULTS: Injury prevalence (stress fractures, tendonitis, plantar fasciitis, patellofemoral pain) was not different among the three BMI strata (28%-38%). Peak GRFs were highest in the overweight group compared to the healthy weight and obese runners, respectively (1919 ± 282 N vs 1566 ± 318 and 1794 ± 419 N; p<0.0001). VILR was also highest in the overweight group compared to the healthy weight and obese runners, respectively (47.9 ± 11.9 kN/s vs 40.7 ± 14.1 kN/s and 39.9 ± 13.3 kN/s; p<0.001). Regression results indicated that after accounting for running speed (R2=.123), BMI accounted for an additional 6% of the variance to the model for VILR (B coefficient 0.251). CONCLUSIONS: The effect of BMI on loading rates during running at a preferred speed is relatively small. Our findings indicate that progressively heavier runners were not at a higher risk for lower extremity injury, and this may be due to internal motion adjustments that are made to control VILR and peak GRF at preferred speeds." @default.
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• W2807461772 date "2018-05-01" @default.
• W2807461772 modified "2023-09-23" @default.
• W2807461772 title "Kinetic Features and Recent History of Lower Extremity Injury in Overweight and Obese Runners" @default.
• W2807461772 doi "https://doi.org/10.1249/01.mss.0000537204.81474.6f" @default.
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