Young Sport Girl Wearing A Sports Bra

The most common sports bra is basically designed like a tank top with the bottom half cut off. Other designs use gel and water pads, silver fibres, and air bags. A stitchless bra was made by Wacoal, was molded, compressed, and shaped. A compressed bra is designed to push the breasts against the chest to reduce movement and bounce. Other bras are knitted in circular patterns, giving varying stretch and support. A common design uses a stretchable, absorbent fabric like Lycra designed to reduce irritation by drawing perspiration away from the skin.
Sports bras are also worn by women after certain surgical procedures. In those situations, a front closing sports bra with a compression, seamless cup is recommended for healing and comfort. Certain fabrics like Lycra have been found to help reduce swelling and help "even-out" a bustline that has been altered by a surgical procedure.
Sports bras are also manufactured for men with large breasts to enable them to take part more comfortably in physical activity. Some descriptions used euphemistically to describe bras for men are chest binders, compression vests or shimmels.
Another problem arises from the shoulder straps of standard bras. Standard well-fitting bras are constructed in the form of a "square frame", with all dimensions adjusted for each woman in a normal standing position, with arms to the sides. When a woman performs an activity which requires her to lift her arms above the shoulders, the frame is strained because it is anchored by the chest band, putting direct pressure on the shoulder trapezius muscles. This may result in neck and shoulder pain, numbness and tingling in the arm and headaches. To avoid such problems the bra's shoulder straps are usually crossed at the back, or the bra is worn halter-style.