Effects of ankle and knee braces on leg stiffness during hopping
© Hobara et al; licensee BioMed Central Ltd. 2014
Published: 8 April 2014
Ten male participants performed one-legged hopping in place, matching metronome beats at 2.2, 2.6, and 3.0 Hz. Based on a spring-mass model, we calculated Kleg using an inertial sensor (Myotest ®, Myotest SA, Switzerland). Commercially-available ankle and knee braces (Ankle Guard-soft and Knee Guard-Ligament3, ALCARE, Japan) were used to constrain these joints, respectively.
Statistical analysis revealed the existence of a significant main effect of hopping frequency (F(1.22, 10.97)= 48.16, p< 0.01; Figure 1-B) on Kleg but no significant main effect of brace conditions (F(3.00, 27.00)= 0.15, p= 0.926), nor a significant interaction between hopping frequency and brace conditions (F(6.00, 54.00)= 0.94, p= 0.472) on Kleg. These results indicate that neither ankle nor knee bracing affects the Kleg in a range of hopping frequency.
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