First of all: it is best not to wear ordinary briefs. Reason: It is a common mistake for many people to wear ordinary briefs when exercising! You are wrong because you didn't feel anything wrong when you were young, because you were wearing thin briefs without support. Don't wait until you get old, your hips will be aligned with the center of the earth because of loose elastic fiber tissue and insufficient support. Secondly: different kinds of underwear should be worn for different sports. So, what kind of underwear should you wear when you exercise without wearing briefs? The best choice is sports bra. The important parts are supported by three-dimensional cut triangular cups, and the left and right tendons support the buttocks. And different sports should also choose underwear with different performances. 1, spinning bike: It is appropriate to choose underwear with good air permeability and flat feet. It is more appropriate to choose underwear with good air permeability, because this sport consumes a lot of physical strength and the body temperature rises quickly. If underwear is airtight, it is like a small steamer, which is not only uncomfortable, but also affects the ability to make people. Those truly professional spinning instructors will choose underwear with pads on the inner thighs, which can greatly reduce the discomfort caused by the close contact between thighs and pads during exercise.