Whole-body biomechanical load in running-based sports: The validity of estimating ground reaction forces from segmental accelerations.

摘要: Abstract Objectives Unlike physiological loads, the biomechanical loads of training in running-based sports are still largely unexplored. This study, therefore, aimed to assess validity estimating ground reaction forces (GRF), as a measure external whole-body loading, from segmental accelerations. Methods Fifteen team-sport athletes performed accelerations, decelerations, 90° cuts and straight running at different speeds including sprinting. Full-body kinematics GRF were recorded with three-dimensional motion capture system single force platform respectively. profiles estimated sum product all fifteen masses or reduced number segments. Results Errors for accelerations low (1–2 N kg−1) low-speed running, moderate (2–3 N kg−1) moderate-speed but very high (>4 N kg−1) decelerations high-speed running. Similarly, impulse (2.3–11.1%), impact peak (9.2–28.5%) loading rate (20.1–42.8%) errors varied across tasks. Moreover, mean increased 3.26 ± 1.72 N kg−1 6.76 ± 3.62 N kg−1 tasks when segments was reduced. Conclusions Accuracy characteristics dependent on task, substantially Using direct mechanical approach estimate is thus unlikely be valid method dynamic high-intensity activities. Researchers practitioners should, cautious interpreting one several segments, these accurately represent loads.