B the part should not be too hard, but should have certain elasticity to cushion the stress on the ground and limbs, reduce the damage to the body and prevent the occurrence of fatigue periostitis.
C. The ventilation conditions of the venue must be good, because aerobics is a typical aerobic exercise. During exercise, the athlete's heart beats faster and breathing faster to ensure that the body has sufficient oxygen supply during exercise.
D The venue should be spacious and bright, not too dark, and the lighting should be appropriate, not too dark and not too dazzling, which is not good for the body and affects the mood of practicing aerobics.
Warm-up exercises must be done before aerobic exercise.
When the weather is warm, the body is easy to move, and the warm-up exercise time can be shorter, and when it is cold, the activity time is slightly longer. Under normal circumstances, the time of warm-up exercise should be controlled at about 20% of the total exercise time, and it is appropriate for the body to feel hot.
When doing aerobics, we should arrange the exercise time and intensity reasonably according to our own physique and the endurance of exercise load. Reluctant exercise is not only not conducive to fitness, but will bring adverse effects to the body.
Relaxation exercise is an indispensable link in aerobics.
Relaxation exercise can make the heart quickly return to normal working state, promote the rapid recovery of the whole body, accelerate the elimination of lactic acid, and avoid muscle congestion and stiffness.
Diet will also have an important impact on the effect of aerobics. Generally, the interval after eating should be 1. Five to two. Aerobics can only be done for 5 hours. Take a break after a meal, so you can eat less. In principle, you should not eat too much before exercise. You should eat something easy to digest and rich in sugar, vitamins and phosphorus. At the same time, try to eat as little as possible foods containing fat, cellulose, irritation and allergy. Take a rest for 30 minutes after exercise before eating. Eat more foods with high energy, low fat and low protein after exercise. Sweat a lot during exercise, so you should replenish water in time.