Table 4. The effect of different prescribed exercise intensity-duration on improving PPD symptoms [MD (95%CL)].

Intensity (duration)	Moderate (35~45min)	Low (50~60min)	High (20~30min)	Control
Moderate (35~45min)	0
Low (50~60min)	-2.63 (-4.05, -1.21) *	0
High (15~30min)	-2.96 (-4.51, -1.41) *	-0.33 (-1.98,1.32)	0
Control	-3.92 (-4.83, -3.01) *	-1.29 (-2.38, -0.20) *	-0.96 (-2.20,0.29)	0

NOTE

* Indicates 95%CL excluding 0, p < 0.05 (statistically significant difference); low intensity:40%HRR, moderate intensity:50~60%HRR, high intensity:65%~74%HRR; Exercise intensity was expressed as reserve heart rate (HRR) = (maximal heart rate—resting heart rate) × percentage of intensity + resting heart rate, maximal heart rate = 220-age; The control group received routine care without exercise intervention.