TABLE 4.

Analysis table of overall correlation test (N = 40).

	M	SD	1	2	3	4
VO2 max	25.98	2.78	–
Pre-SDNN	52.74	14.51	0.36*	–
Post-SDNN	51.11	11.52	0.47**	0.78***	–
Step index	57.80	6.61	0.54***	0.50**	0.39**	–

* P < 0.05, ** P < 0.01, *** P < 0.001.