| Summary: | 碩士 === 中國文化大學 === 體育學系運動教練碩博士班 === 103 === Purpose: The aim of the study was to investigate differences between arch-support insole and normal insole in static balance wavered area, volley depth and ground stroke depth of tennis performance, knee and ankle joint shear force, ground reaction force, ankle inversion and ankle flexion during tennis movement. Method: Subjects were 20 male tennis players from Chinese Culture University (178 ± 4 cm；70 ± 5 kg). The arch-support insoles were chosen according to subjects’ foot and leg type and subjects wore the insoles for at least 2 weeks for accommodation. There were three parts of measurement: 1. Static balance: standing with eyes closed and open for 10 seconds in barefoot and arch-support insole was measured. 2. Tennis performance: volley depth and groundstroke depth were measured in insoles with and without arch-support. 3. Biomechanics: step-cutting, side braking and split step were measured with smart speed which simulated the ball direction in insoles with and without arch-support. Paired-samples T-test was used for analysis. Results: Static balance: significant difference was found between arch-support and barefoot. But the wavered area of arch-support insole was greater than that of barefoot. Tennis performance: significant differences of volley depth and ground stroke depth of tennis performance were found between arch-support and normal insole. Biomechanics: significant difference peak ground reaction force of step-cutting, side braking and split step were found between arch-support and normal insole. The peak ground reaction force of arch-support insole was smaller than the normal insole. Right ankle flexion, inversion and left ankle flexion showed significant differences in side braking between arch-support and normal insole. Ankle and knee joint shear force showed main effect significant differences in split step between arch-support and normal insole. Conclusion: The arch-support insole can reduce the ground impact force and increase the ankle stability during tennis movement.
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