Table 2.

Correlation coefficients between analyzed kinematic variables in the start segment.

	UW Time	UW Distance	KF	Kick count	Deckick	Glide time	Initial-vxhead	First-vxhead	Last-vxhead	Initial-vyhead	First-vyhead	Last-vyhead	Initial-BA	First-BA	Last-BA
UW-vxmean	0.005	0.21	0.21	0.19	-0.19	-0.27	-0.24	0.84†	-0.55	-0.34	-0.31	0.51	-0.32	-0.26	0.56
UW Time		0.98†	-0.28	0.84†	-0.12	-0.15	-0.06	0.58	0.18	-0.48	-0.76#	-0.008	-0.55	-0.70#	0.01
UW Distance			-0.22	0.87†	-0.16	-0.23	-0.15	0.68#	0.35	-0.62	-0.81†	0.12	-0.60	-0.74#	0.10
KF				0.24	-0.57	-0.70#	-0.09	0.39	-0.04	0.55	-0.15	-0.003	0.51	-0.28	-0.49
Kick count					-0.47	-0.60	-0.22	0.86†	0.19	-0.36	-0.85†	0.12	-0.36	-0.88†	-0.16
Deckick						0.59	-0.16	-0.51	0.08	-0.11	0.31	0.21	-0.003	0.45	0.38
Glide time							0.23	-0.82†	-0.19	-0.12	0.57	-0.25	0.04	0.69#	0.26
Initial-vxhead								-0.23	-0.27	0.02	0.25	0.06	0.25	0.17	0.09
First-vxhead									0.38	-0.36	-0.81†	0.26	-0.37	-0.86†	-0.08
Last-vxhead										-0.44	-0.35	0.60	-0.43	-0.33	0.32
Initial-vyhead											0.32	-0.31	0.84†	0.20	-0.45
First-vyhead												-0.34	0.29	0.89†	-0.12
Last-vyhead													-0.25	-0.29	0.35
Initial-BA														0.25	-0.28
First-BA															0.24

UW, underwater; vx_mean, forward velocity; KF, Kick frequency, Dec_kick, the mean deceleration from the first to the last kick; Initial-vx_head, the forward head velocity at the feet entry; First-vx_head, the mean forward velocity during the first kick; Last-vx_head, the mean forward velocity during the last kick; Initial-vy_head, the upward head velocity at the feet entry; First-vy_head, the mean upward velocity during the first kick; Last-vy_head, the mean upward velocity during the last kick; Initial-BA, the angle of the upper body at the feet entry; First-BA, the mean angle of the upper body during the first kick; Last-BA, the mean angle of the upper body during the last kick;

#, p < 0.01;

†, p < 0.001