| As a popular sport of current times,badminton meets people’s pursuit of health and active lifestyle,and the number of people participating in the sport is gradually increasing.Women need to wear sports bras during exercise to reduce breast movement and minimize the impact of exercise on the breasts.Badminton involves unilateral force and large range of body movements,which is different from other forms of exercise.Currently available sports bras on the market usually use low,medium,and high intensity as reference for exercise selection,and there are no bra products specifically designed for certain sports.This research extracts characteristic movements of badminton,obtains the main distribution map of skin deformation in the coverage area of sports bras during badminton exercise,analyzes the main factors that affect the comfort and stability of different parts of sports bras in motion and at rest,and proposes product design reference intervals that meet good comfort and stability.This provides a theoretical reference for underwear companies in developing sports bras suitable for badminton,and can also be helpful for consumers in choosing the appropriate sports bras for badminton.The main research content and results are as follows:First,a badminton enthusiast with a bra size of 75 B tried on 27 different sports bras from 9different brands.Six experimental samples were selected through screening from the brands DECATHLON,Sylphlike loli,Nike,KEEP,Lululemon,and Yvette.These sample bras underwent element analysis.Through the analysis of the characteristics of badminton,five movements are extracted from 26 main movements of the right hand racket.Two participants with a bra size of 75 B were selected.Grid lines were drawn on the surface skin of the covered area of the sports bra,with a grid size of about 2*3cm and a total of 607 line segments.Three-dimensional body scanning was performed in standing still and 5 badminton action poses,and skin deformation rate was measured and calculated.Finally,By drawing the plane grid map and the main skin deformation distribution map,the skin deformation rule under the right hand racket badminton was obtained by comprehensive analysis.Objective pressure data of 14 test points(A1～G1,A2～G2)on the left and right sides of the sports bra were collected by 5 subjects with 75 B under five badminton gestures of the right hand racket holding.Objective slip data were measured on 12 marked points(a1,a2,c1～g1,c2～g2)on both sides after repeating 11 badminton swings ten times.Analysis showed that the pressure and slip changes of different parts of sports bras were as follows: maximum pressure was at point A1(right shoulder strap)and F1(right lower back);minimum pressure was at point C2(left cup).Except for point E1 and E2(front lower perimeter),the pressure on other testing points of the right side was higher than that of the left side.Point a1(right shoulder strap)showed the most significant slip and the direction of slip was towards the neck and front.The correlation between average pressure and slip data was as follows: point A1 and A2(shoulder straps)had a positive correlation between pressure and slip within a certain pressure range;point E1 and E2(front lower perimeter)had a negative correlation between pressure and slip.By analyzing the differences in dynamic and static objective pressure and slip data caused by different design factors of 6 sports bras in the badminton sports evaluation experiment,combined with the skin deformation rules,dynamic and static subjective evaluation data under badminton sports,the main factors affecting the sports comfort and stability of the shoulder strap,cup,side wing,bottom perimeter and back of the sports bra were obtained.Subsequently,reference intervals for product element design that satisfies both comfort and stability were proposed. |
PDF Full Text Request