Analysis Flexibility and Arm Muscle Strength on Badminton Smash Stroke Ability Avanti Makassar Club

Effective badminton smash performance requires the integration of physical capacity, movement control, racket coordination, and the ability to generate a fast and accurate attacking stroke. This study examined the contribution of wrist flexibility and arm muscle strength to smash performance among players of Avanti Badminton Club Makassar. A quantitative descriptive-correlational design with a regression approach was used. The sample consisted of 40 badminton players, with complete valid data for all research variables. Wrist flexibility was measured using a flexiometer, arm muscle strength was measured using a 30-second push-up test, and smash performance was assessed using a badminton smash skill test. Data were analyzed using descriptive statistics, the Kolmogorov-Smirnov normality test, Pearson correlation, simple regression, and multiple regression. The results showed that wrist flexibility contributed significantly to smash performance, R = 0.802, R² = 0.643, p < 0.001. Arm muscle strength also showed a significant contribution, R = 0.815, R² = 0.665, p < 0.001. Simultaneously, both predictors explained 74.3% of the variance in smash performance, R = 0.862, R² = 0.743, F = 53.600, p < 0.001. These findings indicate that badminton smash performance is supported by the interaction between wrist mobility and upper-limb strength. Training programs should therefore combine arm-strength development, wrist-flexibility exercises, and smash-specific coordination drills.