It is desired that the fluid dynamics of swimming is researched to rise the Japanese record of swimming match. Therefore, in 1983, we carried out the experimental research on water flow around human body and effects of swimming suits, and made clear the water flow at towing condition of constant form and effects of swimming suits on the resistance.
　In this research, as next step, we carried out the resistance measurements on a same rigid model of woman body at various trim and sinkage condition, with various swimming suits and without, and the flow observation by means of surface tufts and oil film.
　As results, effects of trim, sinkage and swimming suits on the resistance and water flow around human model were made clear, and the reduction of resistance amounted to about 6% by the improvement of swimming suits design.
　In addition, the difference of water flow around the woman body with swimming suits for match and leisure, was made clear by flow observation.

DESCENTE SPORTS SCIENCE Vol.6/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE