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A sports bra is a bra that provides additional support to female breasts during physical exercise. Sturdier than typical bras, they minimize breast movement, alleviate discomfort, and reduce potential damage to chest ligaments. Many women wear sports bras to reduce pain, and physical discomfort caused by breast movement during exercise. Some sports bras are designed to be worn as outerwear during exercise such as jogging. Larger breasted women may be prevented from taking part in sports or exercise when their breasts move excessively. ==Design and history== (詳細はHinda Schreiber. Lindahl's sister, Victoria Woodrow, complained about her bad experience exercising in ordinary bras, having experienced runaway straps, chafing and sore breasts. During the course of Lindahl and Smith's exploration for a better alternative, Lindahl's husband suggested that what they needed was a jockstrap for women's breasts. In the costume shop of Royall Tyler Theatre at the University of Vermont, Lindahl and Smith actually sewed two jockstraps together and nicknamed it a "jockbra". It was later renamed a "jogbra". One of their original Jogbras is bronzed and on display near the costume shop of the theatre. Two others are housed by the Smithsonian and another by the New York Metropolitan Museum of Art. In 1990 Playtex purchased Jogbra from Lisa and her partners. This was followed by research by Christine Haycock, associate professor of surgery at the University of Medicine and Dentistry of New Jersey. She measured breast movement of women running on treadmills. Sought out by bra manufacturers for her expertise, she advocated wide bottom bands for extra support and firm straps that minimized breasts bounce. Renelle Braaten, a Montana hairdresser, struggled to contain her double-Ds while playing racquetball and volleyball. Unable to interest mainstream bra manufacturers, she collaborated with freelance apparel designer Heidi Fisk, and founded Enell Incorporated. After considerable lobbying, she persuaded Oprah Winfrey in 2001 to try her bra. This led to very positive reviews in ''O: The Oprah Magazine'', a 2001 appearance on ''The Oprah Winfrey Show'', and a huge surge in orders.〔 Sports bras can either encapsulate or compress breasts. Bras that encapsulate breasts have molded cups, while compression-type bras restrict movement by flattening the breasts. Encapsulation-type bras generally are more effective at reducing discomfort, but some women prefer compression designs that enhance their perception of modesty. 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 such as 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 such as 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.〔(Dr. Karen Kowalske. Bra Straps Health Watch. Office of News and Publications & the Library at University of Texas Southwestern Medical Center at Dallas August 2006 )〕 To avoid such problems the bra's shoulder straps are usually crossed at the back, or the bra is worn halter-style. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sports bra」の詳細全文を読む スポンサード リンク
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