Peak physical fitness 15: 00- 18: 00 (the best time for comprehensive exercise) peak muscle pain tolerance 1 1:00 (the best time for endurance exercise) peak muscle strength and grip strength 1 4: 00-/kloc-0. 5:00-65438+ 18+0: 00 (the best time for competitive sports) Explosive exercise time 18: 00-20: 00 (the best time for explosive sports) Fitness enthusiasts generally know that only when the muscles feel sore after exercise will the brain give instructions to make the muscles in this area grow. It is necessary to supplement nutrition in time and implement the instructions of the brain. In order to make exercise time-saving and effective, it is necessary to make muscles feel sore in a short time, but the peak of physical strength, muscle pain tolerance, muscle strength and grip strength are not easy to get sore, so choose 18: 00-20: 00 for exercise. Abdominal muscles need a long time, more than two months to get better. According to your method, it will take about half a year for the abdominal muscles to protrude fat.