University of Portsmouth, Research Group in Breast Health

Institutional summary of two decades of breast-biomechanics work (Wakefield-Scurr and colleagues). During running the breast, which has no muscle or bone to anchor it, moves multi-planar by several centimetres, and a well-fitted high-support sports bra can cut that movement substantially (the group reports reductions up to about 74% for the best high-impact designs). The headline percentages and displacement figures come from institutional and press reporting, so treat the exact numbers as group claims; the direction is robust. Strong for the direction, moderate for precise figures.