There are two types of barbells: standard barbells and non-standard barbells. A standard barbell is composed of three parts: barbell bar (bar), barbell plates and clamps. International weightlifting competitions must use international standard barbells approved by the International Weightlifting Federation. There are two types of barbells for men and women. The main difference between men's barbells and women's barbells is the barbell, and their barbell plates are of the same standard. The men's barbell is 2.20 meters long and weighs 20 kilograms, while the women's barbell is 2.15 meters long and weighs 15 kilograms. The diameter of the barbell is 0.028 meters, and the diameter of the largest barbell plate is 0.45 meters. The outside is covered with rubber, which can increase the appearance and reduce the noise of the barbell landing. The structure of non-standard barbells is the same as that of standard barbells. The size requirements are not strict, the production requirements are not high, the weight can be freely specified, and the stone poles used by the people can also be replaced. In order to meet certain special requirements and develop certain local muscles, special barbells of various shapes (such as flexion barbells, bow barbells, and ring-shaped barbells, etc.) can be made as needed. The barbell is a type of core training exercise equipment and is also used for weightlifting. Barbell exercise is a type of weight training that only uses barbell training equipment to improve muscle strength training. You can also use barbells for core training to promote overall coordination. Beginners should note that it is best to use barbells under the guidance of professionals to avoid straining their muscles.