TABLE 4.

The correlation between the three exercise intensity indexes with the difference of various indicators before and after intervention.

	RPE score		Exercise heart rate		%HRR
	r	p	r	p	r	p
Difference of pain intensity rating	–0.168	0.183	–0.196	0.145	–0.438	0.007**
Difference of pain unpleasantness rating	–0.282	0.065	–0.021	0.456	0.040	0.417
Difference of P2 amplitude	0.122	0.277	–0.040	0.423	–0.277	0.085
Difference of alpha oscillation power density	0.372	0.020*	0.374	0.019*	–0.119	0.262
Difference of forearm HPT	–0.120	0.260	–0.056	0.382	0.207	0.132
Difference of rectus femoris HPT	–0.107	0.283	–0.081	0.333	0.122	0.256
Difference of thenar muscle PPT	0.136	0.232	0.403	0.012*	0.151	0.209
Difference of sacrospinalis PPT	0.263	0.076	0.960	0.303	0.282	0.062
Difference of rectus femoris PPT	–0.022	0.453	0.025	0.448	0.185	0.159
Difference of tibialis anterior muscle PPT	0.054	0.386	0.156	0.201	0.386	0.016*

Difference = posttest–pretest; %HRR: percentage of heart rate reserve = (exercise heart rate—resting heart rate)/(220 - age—resting heart rate)^∗100%. RPE, rating of perceived exertion; HPT, heat pain threshold; PPT, pressure pain threshold. *p < 0.05; **p < 0.01.