<![CDATA[Hamstring muscle strength plays an important role in start and turn techniques because these muscles contribute to body stabilization and thrust production. This study aims to analyze the correlation between hamstring muscle strength and FFM and BFM of the lower extremities in East Java swimmers. A cross-sectional method was used with 30 East Java swimmers (12 females and 18 males). FFM and BFM measurements were performed using InBody 270, while hamstring muscle strength was assessed using the Nordbord Hamstring Testing System. Data analysis was performed using descriptive statistics, Shapiro-Wilk normality test, and Spearman's correlation test. The results showed that there was a significant correlation between right hamstring muscle strength and right FFM (p-value = 0.001, r = 0.579), as well as left hamstring muscle strength and left FFM (p-value < 0.001, r = 0.621). Conversely, no significant relationship was found between hamstring muscle strength and right BFM (p-value = 0.772, r = -0.055) or left BFM (p-value = 0.944, r = 0.013). These findings indicate that the higher the FFM value, the greater the hamstring muscle strength.]]>
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