"Tie-pulling" is a network language, which refers to doing fitness exercises, especially using equipment for strength training in the gym. This word first appeared in the online community in Chinese mainland, and now it has spread to fitness enthusiasts all over the world. The origin of the word "railway" is very interesting. In fact, "iron" does not refer to iron equipment, but refers to the iron load-bearing plates of most fitness equipment.
In the gym, many instruments use weight plates to adjust the load, and bodybuilders need to constantly increase the load to improve the training effect. The word "pulling iron" refers to the gymnast pulling the equipment hard to make the weight plate rise and fall constantly, just like the zipper strip, hence the name "pulling iron".
Benefits of fitness:
Can lose weight, remove excess fat in the body, enhance muscle content and shape a perfect body. Improve human immunity and improve the functions of internal organs, especially the functions of the heart, lungs and gastrointestinal tract. People who exercise regularly rarely get coronary heart disease, lung cough, dyspnea and so on.
People who are happy and exercise regularly can usually maintain a happy mood and are also conducive to work. Can promote sleep, relieve mild fatigue, and promote good sleep at night. Fitness, especially moderate fitness, can promote sleep and maintain a good sleep state.