Table 1. Physical characteristics of the subjects and other observed variables. Subject Age (yrs) Height (m) Mass (kg) Vcrit (m·s-1) D’ (m) MAnP (W·kg-1) V50 (m·s-1) 50m Best (m·s-1) %WR (%) Sp 1 20 1.75 81.9 0.989 9.38 11.2 1.217 1.316 65.8 Br 2 21 1.54 60.7 0.771 6.14 12.7 0.878 1.020 51.0 Bt 3 20 1.70 67.1 0.670 18.88 9.1 0.946 1.010 50.5 Fr 4 20 1.72 60.7 0.800 9.70 10.1 0.992 1.042 52.1 Fr 5 19 1.69 64.6 0.978 4.96 10.1 1.087 1.136 56.8 Br 6 20 1.72 71.0 0.869 10.40 9.7 1.094 1.149 57.4 Br 7 19 1.78 83.0 0.943 12.56 10.3 1.232 1.250 62.5 Br 8 19 1.80 61.5 0.947 9.56 12.2 1.176 1.205 60.2 Br 9 19 1.73 63.5 0.858 12.98 9.2 1.151 1.235 61.7 Br 10 21 1.55 49.2 0.717 9.28 11.2 0.904 0.904 45.2 Fr 11 19 1.76 58.0 0.861 8.23 10.5 1.032 1.111 55.5 Br Mean 19.7 1.70 65.6 .855 10.19 10.6 1.064 1.125 56.2 — SD 0.9 0.09 10.0 0.106 3.73 1.2 0.124 0.123 6.2 — , critical velocity; D’ curvature constant of the hyperbolic relationship between swimming velocity and its time to exhaustion; MAnP, maximal anaerobic power; , average velocity of 50-m time trial. 50m Best, average swimming speed calculated from the best record of 50m breaststroke swimming of each subject;%WR, percentage of the current world record; Sp, most favorite swimming style of each subject; Br, breaststroke; Bt, butterfly; Fr, free-style, respectively.