It usually takes about 40 minutes of aerobic exercise to start burning fat, such as jogging and swimming. Usually, if you want to lose weight, you should take part in outdoor sports and adjust your diet. Don't eat greasy and high-sugar food, drink plenty of water, eat three meals regularly, and keep 60% full every meal. Have a light diet and drink plenty of water. It is recommended to pay more attention to rest and avoid the wrong way to lose weight, so as not to cause harm to the body.