The C cup will definitely vibrate, because the breasts are relatively fat. If it doesn't vibrate at all, then this bra is not very good for the body, and it is not recommended to wear it for a long time, because the pressure is too great, which is similar to pressing and binding.

In addition, whether vibration will affect breast health depends on amplitude and frequency. From your description, it's good to have a little vibration up and down.

You really didn't measure the vibration range you mentioned. But generally, as long as there is no pulling pressure on the chest during exercise, there is no abnormal feeling (vasodilation and other feelings) in the chest at the moment when the bra is untied after exercise.

Finally, people with big breasts, as long as they are healthy, are not recommended to do strenuous exercise, even if you tie up your breasts and don't shake at all. Because it is completely tied, it is not conducive to oxygen inhalation and blood circulation. Pay more attention to the rhythm of running and find a more acceptable rhythm.

Running is more about persistence than intensity. You 100 run 3 kilometers a day, which is better than you 10 run 30 kilometers a day. (Muscle symmetry. . . Hehehe. . . You don't want all kinds of strong and big muscles on your calf, do you? I don't know why you came here, so I chose a common reason.