Figure 1. Individual force–velocity relationships of a representative subject obtained from the 6-loads free (empty dots and straight line), 4-loads free (empty dots and long dashed line) and 4-loads Smith (filled dots and short dashed line) methods.

The regression equations and the Pearson’s coefficient of determination (r²) are presented. Note that the points corresponding to the four heavy loads were the same for the 6-loads free and 4-loads free methods, while only the 6-loads method also considered the data of the two very light loads (one and eight kg).