| Summary: | 碩士 === 國立臺灣大學 === 運動設施與健康管理碩士學位學程 === 107 === Purpose: This study investigated the effect of different habitual exercise on muscle stiffness through ultrasound strain elastography and shear wave elastography (SWE). It further-examined the correlation between two different measuring methods and the correlation between aerobic performance and muscle stiffness. Method: A cross-sectional study was conducted on a total of 54 healthy adult males (aged 20-40 years) with different exercise habits, including participants who practice regular resistance training (RRT, N = 18), regular aerobic training (RAT, N = 18), and the non-exercisers (NE, N = 18). The muscle stiffness data of biceps brachii muscle and rectus femoris muscle were collected by an ultrasound system, and the aerobic performance was tested on the Wattbike. Result: RRT group had a significantly higher muscle stiffness than the other groups (p ≤ 0.001). There was a moderate correlation between two stiffness measuring methods of the biceps brachii muscle. Peak power (PP) and relative mean power (RMP) are indicators of aerobic performance. PP showed a moderate correlation with strain rate (r = 0.303), and RMP showed a moderate negative correlation with strain rate (r = −0.331). Conclusion: Habitual participation in RRT exercise was associated with higher muscle stiffness. Strain elastography might be an alternative stiffness measuring method when shear wave elastography is not available.
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