1, the intensity of running is much greater than that of brisk walking.

2. Whether it is fitness or fat reduction, it depends on the heart rate. The best heart rate for reducing fat is between 65% and 75% of the maximum heart rate. The strength that determines the heart rate is the intensity of exercise. Low-intensity exercise, even long-term exercise, is not helpful to improve health.

Be sure to eat something before exercising in the morning. It can be food with high sugar content, such as chocolate or candy bars. Do not exercise on an empty stomach.