Relative Contributions of Body Height and Leg Power to Maximum Walking Speed in Water

Fukusaki, C. Relative contributions of body height and leg power to maximum walking speed in water. J Strength Cond Res XX(X): 000-000, 2026-This study aimed to identify the factors influencing maximum walking speed in water and to quantify their relative contributions. A total of 132 young adult women participated in a 10-m walking test on land and in water at both their preferred and maximum speeds. Multiple regression analysis using the forced entry method was conducted to assess the independent effects of leg extension power, height, and body mass index on maximum and preferred walking speeds in both environments. The analysis revealed that height and leg extension power significantly predicted maximum walking speed in water (p < 0.001 and p = 0.002, respectively), with height exhibiting a larger standardized regression coefficient (β = 0.342) than leg extension power (β = 0.257). Leg extension power was the only significant predictor of maximum walking speed on land (β = 0.293, p < 0.001). No significant association was observed between preferred walking speed and independent variables in either environment. These findings suggest that maximum walking speed in water is primarily associated with height, followed by leg extension power, and highlight the importance of height when designing and implementing water-based walking exercises for therapeutic or training purposes. Shorter individuals are less likely to achieve higher walking speeds in water, potentially reducing exercise intensity and effectiveness.