Let me be brutally honest. If you participate in sports, you need to wear a sports bra. If you do not, you risk doing major long term damage to yourself. Studies have shown running can result in five or more inches of bouncing for breasts after all.
Of course, things do not move just up and down. They also move to the left and right as well as in other directions. Exercise is great. That being said, what is the benefit of helping one part of your body while damaging another area?
Your breasts are not supported by muscles per se. Instead, they are supported by ligaments and, obviously, skin. If you watch sports at all, you know ligaments can be damaged and skin, of course, stretches. You need some additional support.
When it comes to fashion, the sports bra is a dud. It is bland as they come, but that is okay. Wearing a sports bra means you will be able to wear a sexier bra when you desire to smolder without worrying about the effects of gravity.
For the longest of times, there was only one sports bra. It was known as the compression sports bra and worked pretty well. In recent times, the encapsulation bra has come on the scene and is receiving good reviews.
When it comes to tradition, the compression sports bra is the queen. The bra counters the effects of bouncing by flattening the breast against the chest as a one piece support system. This effectively keeps the ligaments from being stretched or stressed.
The encapsulation bra is the new girl on the block. She was created for larger women. Instead of eliminating bouncing by flattening the breasts, this bra provides stiff support in the cup to allow movement but limited stress on the ligaments.
Since we have two basic sports bras, you undoubtedly want to know which one you should use. There is no real right answer. The compression bra is good for women with B cups or less, while the encapsulation bra is comfortable for bigger sizes.
The sports bra has not really changed all that much since it was first created, the encapsulation cup notwithstanding. The issue is not so much which version you wear as it is whether you wear one or not. You would be crazy not to.