Railway, a popular word on the internet, refers to the use of barbells, dumbbells and other lifting fitness equipment for strength training. It is a nickname for young people for fitness, which means fitness.

Fitness can improve cardiopulmonary function, especially running, swimming and other sports, which can improve the contractility of the heart and enhance vital capacity; Secondly, fitness can also improve blood lipid metabolism. During exercise, the metabolism of the body will be accelerated, and the metabolism of various organs will also be accelerated, thus improving the internal environment balance. While lowering the blood lipid level, it can also improve insulin, resist and reduce the occurrence of diabetes. Fitness can also improve bone strength, make bones stronger and prevent osteoporosis.