As we all know, adipose tissue in women's breasts accounts for a high proportion. When you lose weight by running, your body fat will inevitably decrease, because running is too thin to lose weight selectively. Therefore, a considerable number of women will find that the cups become smaller after running for a period of time.

In addition, many women do not wear a sports bra with supporting and protecting functions when running, and there is no other ligament or muscle tissue to support or support the female chest except the pectoralis major at the bottom. If there is no extra protection, the swing caused by running will damage the elastic fibers of the chest and lead to sagging of the chest. Then visually, you will feel that your chest is getting smaller.

2 How to prevent the chest from getting smaller when running

How to deal with:

1, reasonably arrange the running amount. Generally, healthy running will not make the chest smaller quickly, unless it is long-distance running. If you only run three or five kilometers at ordinary times, I don't think you need to be particularly worried.

2. Wear a sports bra. I won't elaborate on this. The necessity of sports bra should be recognized by women now, not only for size, but also for their own health.

3, increase the corresponding chest fitness exercise. The bottom pectoral muscle supports the shape of the breast. The pectoral muscles are more developed, and the breasts will look bigger. Of course, don't practice too hard. Your boyfriend may not like it.