Table 3.

Comparison of exercise tolerance between the 2 groups ($\overline{\chi }\pm s$).

Group	6MWT distance (m)
	Pre-intervention	Post-intervention
Regular group (n = 60)	235.69 ± 25.58	276.34 ± 23.08*
Observation group (n = 60)	238.75 ± 23.22	414.21 ± 32.96*
t	−0.686	−26.54
P	.494	.000

^* Compared with the group before intervention, P < .05.