Before running, you mainly consume sugar and water. Only when exercise reaches a certain fat burning heart rate can it play a role in losing weight. Therefore, dieters need to run continuously for more than 30 minutes before they can start burning fat. For ordinary people, it usually takes time, and the longer the better. It is best to keep it within two hours.

Generally, morning running is effective, because it is easier for dieters to enter the state, mobilize body fat, reduce fat accumulation and consume more energy. But now the air quality pollution is serious, and it is easy to inhale dust in morning running, which may have a bad impact on people's health.