It takes at least 40 minutes to maintain aerobic exercise to achieve the effect of losing weight! Because losing weight requires burning fat, and after keeping aerobic exercise for 30 minutes, your body has just started burning fat. So if you don't continue to exercise after walking slowly for 30 minutes, the effect is very small. But if you can persist in aerobic exercise after 30 minutes, the fat burning effect will get better and better! Because at this time, every minute of your exercise is consuming excess fat on your body! I wish you success in losing weight!