Figure 4.

Regression analysis between minimum number of strides and age or natural speed. Circle - amputees; Square - control subjects. Left panel: minimum number of strides for Ad1_AP computation (top: relationship with age; bottom: with natural walking speed). Right panel: minimum number of strides for Ad2_V computation (top: relationship with age; bottom: with natural walking speed). R² and P values, and regression equations, are reported. Variable distributions are logarithmically transformed.