Start Fast, Swim Faster, Turn Fastest: Section Analyses and Normative Data for Individual Medley

Table 5. Mechanistic analysis of the effect of the 15 m start time, mean total turn time (5 m before to 10 m after wall contact), mean free-swimming velocity, mean stroke rate, and mean distance per stroke on Individual Medley (IM) race time as the dependent variable using stepwise regression analysis with all participants of each event.

			Regression model			P-value	Regression coefficients
			Entries	R square	F-value	P-value	Beta	T-value	P-value
Males	100 m IM	Turn time [s]	70	0.98	F_{(3 \| 66)} = 1013	P < 0.001	0.53	T = 11	P < 0.001
		Swim velocity [m/s]					-0.34	T = -12	P < 0.001
		Start time [s]					0.19	T = 5	P < 0.001
	200 m IM	Turn time [s]	59	0.99	F_{(3 \| 55)} = 3055	P < 0.001	0.65	T = 32	P < 0.001
		Swim velocity [m/s]					-0.36	T = -21	P < 0.001
		Start time [s]					0.04	T = 3	P = 0.009
	400 m IM	Turn time [s]	26	0.97	F_{(2 \| 23)} = 313	P < 0.001	0.78	T = 16	P < 0.001
	400 m IM	Swim velocity [m/s]	26	0.97	F_{(2 \| 23)} = 313	P < 0.001	-0.29	T = -6	P < 0.001
Females	100 m IM	Turn time [s]	73	0.99	F_{(3 \| 69)} = 3181	P < 0.001	0.63	T = 26	P < 0.001
		Swim velocity [m/s]					-0.28	T = -15	P < 0.001
		Start time [s]					0.14	T = 7	P < 0.001
	200 m IM	Turn time [s]	46	0.99	F_{(3 \| 42)} = 1858	P < 0.001	0.57	T = 19	P < 0.001
		Swim velocity [m/s]					-0.42	T = -18	P < 0.001
		Start time [s]					0.06	T = 3	P = 0.006
	400 m IM	Turn time [s]	36	1.00	F_{(2 \| 33)} = 3791	P < 0.001	0.58	T = 27	P < 0.001
	400 m IM	Swim velocity [m/s]	36	1.00	F_{(2 \| 33)} = 3791	P < 0.001	-0.46	T = -21	P < 0.001