Fig. 2. (A ) Nonlinear regression analysis between performance error with Shafer model (PE-Shafer) and total body weight (TBW). The equation for this relationship is as follows: PE(%) = 196.4 × e −0.025 kg− 53.66; R squared = 0.689, P < 0.001. ( B ) Nonlinear regression analysis between performance error with Scott model (PE-Scott) and TBW. The equation for this relationship is: PE(%) = 266.8 × e −0.025 kg− 34.74; R squared = 0.303, P < 0.001.