In a strict sense, the impact of physical exercise on the human body does not depend solely on the amount of exercise, but the exercise load (“exercise” is just a common name). The main factors that make up the exercise load are “amount” and “intensity”. In physical exercise, we should pay attention to the relationship between volume and intensity to deal with the appropriate. The greater the intensity, the amount should be reduced accordingly, the intensity is moderate, the amount can be increased accordingly. As a fitness-oriented exerciser, the focus should be on the amount of exercise. The following principles can be used for reference: 1, through the heart rate to control the general heart rate percentage method can be used. Direct measurement of the individual’s maximum heart rate is difficult, generally men and women can use 220 minus age to estimate the maximum heart rate per minute (it is also recommended that women use 210 minus age to estimate). For example: someone 20 years old, the exercise intensity of its exercise process should be controlled in the range of heart rate: (220-20) × (70% to 85%): 140 to 170 (times / min), which is known as the appropriate load for oxygen exercise. Or use the heart rate close to the limit of exercise (generally assumed 200 beats per minute) minus 70% of the heart rate at quiet time (here assumed 60 beats per minute), plus the quiet heart rate base 60 times, that is, the heart rate during exercise is (200-60) × 70% 60 = 98 60 = 158 (times / min) This is the best exercise intensity for the body impact. 2, through the diet to control After exercise, if the appetite is very good, the amount of food also slightly increased, indicating that the load of its exercise is more appropriate; on the contrary, it means that the amount of exercise is too large. 3, through the work efficiency to control through physical exercise, physical fitness, memory, learning and work efficiency, indicating that the amount of exercise is just right. If the body is thin, sickly, learning and work efficiency decline, it means that the amount of exercise is not appropriate, should be adjusted in a timely manner. 4, through the mental state to control the exercise after a good effect should be full of energy, full of energy, no sleepy fatigue symptoms. On the contrary, it means that the exercise load is too large. 5, through the amount of sweating to control Generally speaking, the more appropriate degree of exercise is just sweating or sweating slightly after exercise. Not sweating means that the load is not enough, sweating profusely means that the amount of exercise is too large. Encourage obese patients to “control the mouth, open the legs”. Those patients with a BMI of 30 or less who are simply obese, exercise more to control their weight. At least take care of your body.