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.