1. Training mode error. If you only do aerobic exercise, your body will adapt to new exercise, especially aerobic exercise, within six weeks. If you run like this for a year, your body may have adapted for ten months. With the same amount of exercise, your fat burning efficiency has decreased.

2. the strength is not enough. One of the main reasons why many people lose weight in fitness is that the training intensity is not enough. For aerobic exercise, one of the main indexes to measure training intensity is heart rate.

3. Pay too much attention to the local. Many people may never exercise their abdominal muscles. Abdominal muscle exercises such as sit-ups and flat support can enhance core strength, but it is basically useless to exercise abdominal muscles, and it is useless to support them for an hour.