You can choose fitness to improve your physique and make yourself stronger. Long-distance running can improve the function of respiratory system and cardiovascular system. Scientific practice has proved that long-term rhythmic deep breathing can make people inhale a lot of oxygen. If the oxygen intake exceeds 7-8 times of usual, it can inhibit the growth and reproduction of human cancer cells.

Secondly, long-distance running also improves the oxygen supply state of myocardium, accelerates myocardial metabolism, thickens myocardial fibers and enhances myocardial contractility, thus improving the working ability of the heart.

Extended data:

Fitness long-distance running is beneficial to prevent and treat diseases, accelerate blood circulation and clean up harmful substances in the excretory system, thus making it difficult for harmful substances to stay and spread in the body. According to the determination,/kloc-running 3000m in 0/6 minutes or 5000m in 25 minutes can reduce blood cholesterol. This has a good preventive effect on the elderly who are prone to different degrees of hyperlipidemia, which in turn leads to arteriosclerosis, coronary heart disease and cerebrovascular disease.

References:

Fitness-Baidu Encyclopedia