Physical fitness: sprint, explosive power is very important. Usually, the ligaments should be stretched first, especially the hamstring muscles of the knee joint. You just need to jog to warm up. Two laps is enough. After a minute's rest, you should immediately lift your legs in place. After feeling tired, you should continue to sprint 50- 100 meters. It's best to have three groups at a time. But the muscles really can't stand it. Add slowly. If you can, you'd better run the hillside, stairs, or carry people (the weight should be equivalent to your own).
Heartbeat: one reason is that you are not confident enough to give yourself a nervous signal; The other is the reaction of ordinary people, more contact to enhance their confidence.
Methods: One day's training was conducted in "field mode" every other day, and the ligament, warm-up time and intensity should be suitable for the situation at that time, and then the 800-meter test was carried out. Breathing style is very important when running. You should lick the upper jaw with your tongue, try to breathe through your nose at first, and breathe through your nose and mouth at the same time when sprinting. The game must start with the first one or two. After that, take a short rest and jog again. After training, you should massage your leg muscles, eat fruits, and supplement carbohydrates (things made by wheat will be consumed after exercise, and muscles cannot synthesize themselves, so you should take them in, which is an essential element to build muscles) and high-protein foods, but you should not eat high-calorie foods at midnight, so it is best not to eat them. If you are really hungry, eat an apple.
There is basically no problem in improving your physical fitness according to this. I hope you can win the game.