Fitness and bodybuilding are two different concepts, which are both related and different. Fitness refers to the physical exercise that ordinary healthy people engage in to enhance their physique, mainly to develop and enhance the functions of human internal organs, especially the cardiovascular system and respiratory function, as well as the quality of strength and endurance, that is, the exercise mainly based on aerobic metabolism.

Bodybuilding is a physical activity that uses heavy objects or special equipment such as bare hands, dumbbells, barbells, kettlebells, etc., and adopts various action modes and effective methods to exercise, increase physical strength, develop muscles, improve body shape and cultivate sentiment.