Running in tight shorts can reduce muscle vibration, and the muscles will keep vibrating during exercise, which will lose a lot of strength and energy, which is not worth the candle.

Secondly, tight shorts, such as external muscles, can improve muscle strength to a certain extent, and to a certain extent, tight muscles are more likely to get excited.

However, tights are suitable for short-distance events and not recommended for long-distance events, because they are not helpful to improve the performance of long-distance events.