Sports bra

A supportive garment designed to reduce breast movement and discomfort during physical activity. Sports bras use compression, encapsulation, or both to support the breasts.

Breast biomechanics: The study of forces and motion in breast tissue during movement. It explains why breast movement can cause discomfort and why support needs vary with activity.
Bra: A garment designed to cover and support the breasts. A sports bra is a bra adapted for physical activity.
Running: A form of locomotion in which a person moves rapidly on foot. Repeated impact makes breast-motion control especially relevant to running.
Exercise-related breast pain: Breast discomfort associated with physical activity and breast movement. Reducing movement can help limit discomfort during exercise.
Breast motion: The displacement of breast tissue during body movement, including walking and running. Sports bras are designed to limit this motion during exercise.
Underwire bra: A bra with rigid or semi-rigid wires beneath the cups. Sports bras may use underwires, but support does not depend on them.
High-impact exercise: Physical activity involving repeated forceful impacts or rapid changes in movement. Such activity often calls for stronger breast support than low-impact movement.
Physical activity: Bodily movement produced by skeletal muscles that expends energy. Sports bras are intended to make physical activity more comfortable.
Compression garment: A close-fitting garment that applies pressure to the body or a body part. Compression is one way sports bras reduce breast movement.
Sports bra sizing: Sizing systems used to match sports bras to body measurements and garment fit. Sizing varies across brands and affects support and comfort.

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