Design and testing of a high-speed treadmill to measure ground reaction forces at the limit of human gait.

摘要: Investigations focused on the gait and physiological limits of human speed have been on-going for more than a century. However, due to measurement limitation kinetic understanding foot-ground collision how these dynamics differ between individuals confer limit has only recently begun come forth. Therefore, we designed tested an instrumented high-speed force treadmill measure forces occurring at performance. The was maximize flexural stiffness natural frequency by using honeycomb sandwich panel as bed surface flexible drive shaft roller servo motor reduce mass supported elements which contribute system's response frequency. functional performance met or exceeded criteria established ideal plates: high (z-axis = 113 Hz), low crosstalk components (Fx/Fz 0.0020[SD 0.0010]; Fy/Fz 0.0016[SD 0.0003]), linear (R(2) > 0.999) loading with known weights (range: 44-3857 N), accuracy 2.5[SD 1.7] mm 2.8[SD 1.5] in x y-axes, respectively, point application. In dynamic testing running speeds up 10 m s(-1), measured durations magnitudes application were similar over-ground platform. This design provides precise capable recording multi-axis ground reaction applied during foot contacts fastest men animals science.