The Impact of Sports Bra Support Intensity on Breast Movement During Running
This study aims to explore the factors influencing the protective effect of sports bras on the breasts during physical activity.Two sports bras with different support intensities were selected,and a VICON motion capture system was employed to collect displacement and velocity data of various breast regions in five young women with a 75B cup size,under varying running speeds.The displacement data of each breast region were transformed into relative displacements with respect to the torso using MATLAB software,and statistical analysis was performed with SPSS software.Additionally,subjective evaluations of the sports bras'protective efficacy were incorporated.The study concluded that,at different running speeds,the breast movement trajectories were relatively similar when wearing sports bras of the same support intensity,but there were notable differences when wearing bras with varying support levels.The amplitude of movement in the inner and lower points of the breast in the left-right,front-back,and vertical directions increased with running speed.Therefore,protection in the vertical direction alone is insufficient;when wearing low-support sports bras,the velocity range of breast points was significantly higher than when wearing high-support bras,and this difference grew with increased running speed.At running speeds of 9 to 15 km/h,the subjective comfort ratings for high-support bras were notably higher.
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