Many athletes will pursue a lower body fat percentage, such as the world's top track and field sprinters, and the body fat percentage can even be controlled below 8%. Pen ~ fun ~ pavilion www.biquge.info another example is basketball, which requires physical confrontation, increasing muscles helps to improve the body's ability to fight.

However, not all sports require a low body fat rate, just like skiing, if the fat content in the body is too low, it is not conducive to the warmth of athletes, and the temperature of the body is too low will inevitably reduce cell activity and slow down the operation of organs, thus affecting the athlete's competition state, so there are almost no athletes with that kind of muscle stick type among skiers.

For example, some water sports also require athletes to have a certain amount of body fat, because fat increases body volume and increases body buoyancy, which allows athletes to spend less physical effort to maintain buoyancy. For example, if you send a muscle stick on the field, it will sink to the bottom as soon as you get out of the water, and it takes a lot of effort to get to the surface.

The body of a diver also needs a certain amount of fat, because if the body fat rate is too low, the muscles will be very stiff, the coordination of the body will also decrease, and it is difficult to make complex movements. Therefore, although the muscles of divers are more developed, they will definitely not be like those of a bodybuilder.

In addition, as a racing sport of swimming, the athlete's body also needs fat, which is similar to water polo, fat can provide buoyancy, and people with too low body fat rate have to spend more physical strength to maintain the buoyancy of the body, and the physical strength will be reduced when used to move forward, which will affect the speed of swimming. It is precisely for this reason that there are no world champions in swimming among those black athletes who are full of muscles, and many world champions in swimming events may not even have obvious abdominal muscles because of body fat percentage problems.

The system continued: "Weight loss exercises and fat loss exercises are two completely different things, and athletes in some sports don't need too low body fat percentage, so they use weight loss exercises to lose weight more quickly; And in some sports, the lower the body fat percentage, the better, so they need fat loss exercises, which can greatly reduce fat and small muscle loss. ”

"I understand what you're saying, but in fact, how can so many athletes need to lose weight? I can meet one Yu Feifei, it's already bad luck, this kind of athlete, I'm afraid it's difficult for me to meet the second one. Yu Feifei will gain weight because of physical development, and under normal circumstances, athletes maintain a lot of exercise every day, and it is difficult to gain weight. Li Dai said with some deflatedness.

Later, Li Dai set his sights on the second book.

"The last book was a fat loss exercise for my father, I hope this one doesn't pit me." Li Dai looked carefully, and there were four big words written on the book: Relaxation and Massage.

"Relaxing massage? How does it sound like there is a taste of great health care. Li Dai had some evil thoughts in his heart.

"After a lot of physical exercise, people will experience muscle soreness, this soreness will reach its peak within 24 to 72 hours after the workout, and after 5 to 7 days, the soreness will basically disappear, in addition to the soreness, there will also be muscle stiffness, only tenderness in the light, swelling of the muscles in the severe, hindering movement, etc., which is medically known as 'delayed muscle soreness'. If you have a maximum number of sports sessions in the summer, you can also have symptoms such as dehydration, low calcium, and low protein......" explained the system.

Li Dai immediately continued: "I know that the main cause of muscle soreness is a sharp increase in muscle tension and elasticity, or a physical injury to the structural components of the head; secondly, because of the increase in metabolism, the toxicity of metabolic waste to tissues increases; The third is the change in the neuromodulation of the muscles, which causes the muscles to spasm and cause pain. I've learned them all! ”

"So you should know that massage after exercise can reflexively improve and regulate the function of the central nervous system, eliminate muscle fatigue, and the anaerobic metabolites accumulated in the muscles during exercise can be converted or discharged as soon as possible through massage. This relaxing massage does just that. ”

The system paused, then continued; "In addition, for athletes, relaxation massage can also help reduce pressure on muscles and ligaments, prevent muscle strain injuries, and avoid muscle and ligament strains."

Athletes have to do high-intensity training every day, so the muscles are often in a state of tension all the time, and muscle tension can easily cause injury, just like a bow, if the bowstring is pulled for a long time, the bow will lose its elasticity and even be pulled off.

The same is true for the human body, if you have been maintaining a high-intensity exercise state, it is easy to get injured, so the more high-intensity training, the more you need some auxiliary means to relieve muscle fatigue, compared to some expensive equipment, massage is obviously a very simple and effective way. Many training teams will be equipped with professional masseurs, massage therapists, such as some professional teams, will also be equipped with foot therapists and acupuncturists to help athletes relieve muscle fatigue.

The things introduced by the system are all the professional content that Li Dai once studied, which made Li Dai a little drowsy.

"Okay, okay, I understand what you said!" Li Dai yawned, but suddenly, Li Dai felt as if he was missing something.

"You seem to have talked a bit too much today, and you just said 'for athletes', is there anything else you haven't told me?" Li Dai asked suddenly.

"I haven't had time to say it yet. This relaxing massage is effective for anyone. The system explained.

"Anyone? In other words, ordinary people can use it? Li Dai immediately asked.

"Yes, not only professional athletes, but also ordinary and amateur athletes can use relaxing massage. The previous fat loss exercise, like the weight loss exercise, is only effective for athletes. The system continued.

"If ordinary people are useful, a relaxing massage is much more useful than fat reduction exercises." Li Dai's mood was finally a little happier.

"Actually, I don't think it makes a difference. You're already a second-rate coach, so you won't be idle to give a relaxing massage to ordinary people. The system interjected.

Li Dai was slightly stunned, and felt that this was really the truth, the current Li Dai is no longer the Li Dai of a year ago, a year ago Li Dai was only facing some junior high school students who took the high school entrance examination, and now, Li Dai has even been guided by the world champion, so naturally he will not be idle to do anything relaxing and massage for ordinary people.

"In this way, the use of relaxing massage is not as great as I thought." Li Dai thought to himself.