Secondary outcomes
There was no difference in RPE between the groups (F [1,11] = 1.60, p = 0.23 95% CI − 1.55 to 0.39; d = 0.60). Similarly, the internal load showed no difference (F [1,14] = 0.12, p = 0.73; 95% CI − 0.77 to 1.09; d = 0.17). Figures Perception of Effort at each 400 m lap. Values are presented as mean ± standard deviation. ANODAL (n = 9) and SHAM (n = 9). p = 0.23.Internal Load. ANODAL (n = 9) and SHAM (n = 9). Values are presented as mean ± standard deviation. p = 0.73.