First of all, we can intuitively feel that the lifting weight has increased, whether it is the change of the number of barbell pieces or the size of dumbbells on the barbell, or the obvious downward movement of the load-bearing bolts of the gantry, it makes us feel great!
Secondly, we began to see our changes in the mirror. Our muscles will get bigger and our appearance will change slightly, which will make us look better! In sports science, we call these two changes "strength increase" and "muscle hypertrophy" respectively.
Fitness has the following benefits:
1, 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.
2, fitness long-distance running is conducive to disease prevention. Fitness long-distance running accelerates blood circulation and cleans 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.
3, fitness long-distance running is conducive to a comfortable mood and a happy spirit. Because this kind of long-distance running does not pay attention to the outcome of the competition, it only seeks to keep fit in a relaxed and happy way, so it is very beneficial to alleviate the mental and psychological tension brought about by high-tempo and high-intensity sports in modern society. According to medical experts, this kind of relaxed and pleasant exercise can best promote the release of endorphin bark, a polypeptide substance in the body, thus causing lasting euphoria and sedation. In addition, because long-distance running makes people full of optimism, it helps to increase appetite, strengthen digestive function and promote nutrient absorption.