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. Author manuscript; available in PMC: 2016 Jun 6.
Published in final edited form as: J Biomech. 2015 Apr 22;48(11):2919–2924. doi: 10.1016/j.jbiomech.2015.04.023

Fig. 4.

Fig. 4

Average (S.D.) individual limb power ratio (ILPR) of the trailing and leading legs during step-to-step transitions at each slope and velocity. ILPR is calculated as the ratio of individual leg mechanical power during the step-to-step transition and overall metabolic power. (a) Trailing leg ILPR was maximized at 0° and decreased at slopes greater or less than 0° at 1.00 m/s and 1.25 m/s. At 1.50 m/s, trailing leg ILPR was maximized at −3°. Regression models were ILPR= −0.0009s2−0.0036s+0.3506 at 1.00 m/s (R2=0.21), ILPR= −0.0031s2+0.0019s+0.4851 at 1.25 m/s (R2=0.72), and ILPR=−0.0046s2− 0.0002s+0.5642 at 1.50 m/s (R2=0.78), where s is slope (deg). (b) Leading leg ILPR increased up to six-fold and decreased by up to 73% at −9° and 9°, respectively, compared to 0°. There were no differences in ILPR due to changes in velocity. Regression models were ILPR=0.2783e−0.219s at 1.00 m/s (R2=0.71), ILPR=0.2511e−0.292s at 1.25 m/s (R2=0.78), and ILPR=0.3458e−0.257s at 1.50 m/s (R2=0.77).