Running on an empty stomach in the morning is effective for losing weight.

Because after sleeping all night, there is no food in my stomach. At this time, there is no source in the stomach that can provide energy and consume calories. After running for 20 minutes, the body ran out of glycogen. At this time, the body is in a protective mechanism and will consume exercise with fat as fuel. After running for 40 minutes, the metabolic rate consumed by the body consumes 300 calories more than running after eating food. And running on an empty stomach in the morning will consume more calories than running in the afternoon.

People with hypoglycemia are not recommended to run on an empty stomach, because people with hypoglycemia will faint if they don't eat before running. This kind of person is not suitable for running on an empty stomach. Eat some bread or sweets before running.

In addition, any crowd should add some water before running to prevent collapse caused by excessive water loss after running. Choose boiled water or mineral water as drinking water. Drinking high-sugar and carbonated drinks is not recommended because it will increase the burden on the stomach.