The determinants of swimming performance was examined from the physiological and mechanical analysis in swimming by the 13 trained college swimmers (age ; 20±1yrs). Maximal oxygen uptake (VO₂max), maximal blood lactate concentration (MBLC) and onset of blood lactate accumulation (OBLA) as physical fitness factors, and a drag coefficient, a drag exponent, and maximal propulsive power (MPP) as mechanical factors were determined. All mechanical factors were measured with a MAD (Measurement of Active Drag) system. Also, a swimming time of 100m and 200m swimming with maximal effort was measured. Swimming performance significantly correlated with MBLC, OBLA and MPP (p<0.01), but not with VO₂max, drag coefficient and drag exponent. Then, multiple regression analysis was done to predict of swimming performance with MBLC, OBLA, and MPP as independent variables. The analysis proved that MBLC and the OBLA in 100m, and OBLA and MPP in 200m were adopted as the significant predictors in swimming performance. These results suggest that MBLC as an indicator of anaerobic capacity, OBLA and MPP which would associate with the swimming technique would be dominant determinants of swimming performance, at least of 100m and 200m event, in well trained swimmers.

DESCENTE SPORTS SCIENCE Vol.25/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE