Wait until 2 hours after meals before exercising, and insist on aerobic exercise, jogging, swimming, cycling, mountain climbing, etc. It mainly depends on your heart rate. The calculation method is (220- your age) *60%. Keeping your heart rate running for more than 20 minutes may have the effect you want. I usually walk for 5- 10 minutes, then jog for 30 minutes and then walk for 20 minutes.