An experimental study on the vibration control of brassieres designed for different breast sizes and shapes

Abstract

In order to design brassieres (bras) which effectively control breast vibration, the vibration of breasts when wearing a bra was measured using high speed cameras during walking, running and jumping. The subjects consisted of six young females with different cup sizes. The bra patterns were made based on the size and shape of each subject's breast, and the underbust of bras in three different sizes. The following results were obtained: 1. The smaller the underbust size of bras, the higher the clothing pressure, the side part of the underbust having the highest clothing pressure; 2. Through amplitude and average acceleration, the vibration prevention effect of bras was shown to be in the vertical direction during jumping; the vertical amplitude and average acceleration of the L group were collectively larger than those of the M group; 3. Average acceleration showed a positive correlation with breast size in the vertical direction during running or jumping, and a positive correlation with point N vibration in the horizontal direction; and 4. The vibration loci of the breast and brassiere were almost the same, and the difference of dislocation between them in different underbust sizes was small.