Breast is a gland organ hanging on pectoralis major, which is mainly composed of fat, mammary gland and connective tissue, without the support of bones and muscles. Among them, suspensory ligament has great support for breast. The shaking of the chest during exercise makes these ligaments elongate and tighten, which will easily lead to sagging breasts in the long run. The most terrible thing is: irreversible! In other words, it is drooping for one day and drooping for a lifetime. Look at the picture below, just thinking about it makes me feel chilling.
Professional sports bra will be far superior to ordinary underwear in three aspects: stable chest, convenient exercise, perspiration and ventilation.