Abstract:

In order to ezplicit the skin deformation of a rider when cycling under different road conditions and body postures, four body postures during three different road conditions were analyzed. The skin deformation was measured during the process. Research results were as followed. The shoulder breadth reduced to -14.26% under downhill condition, the back width increased to more than 25% under normal and downhill conditions, and the waist girth increased to the most downhill condition and to least under uphill condition. The chest, thigh and calf girths changed not more than 3%.  The front of upper body reduced in levels, and the deformation was more than -10% under normal and downhill road conditions. The back of upper body increased no more than 5%. The front length from waistline to calfline was reduced, but its lateral length was not changed too much.

Key words: riding posture, road condition, skin deformation, cycling sportswear