Journal of Sports Science and Medicine

Variables

Start
segment

Turn
segment

Correlation
coefficient

T-test
Difference

ANOVA

Start
(vs. T_0-15)

Turn
(vs. T_25-35)

Main effect
(Segments)

Main effect
(Events)

Interaction

Lap time (s)

11.51 ± 0.43

13.71 ± 0.59

0.93^†

0.90^†

n.a.

T_0-15 and T_25-35 (s)

6.24 ± 0.25

5.35 ± 0.25

n.a.

UW-vx_mean (m·s^-1)

2.26 ± 0.11

1.98 ± 0.08

-0.70^#

-0.95^†

0.28 ± 0.92^†

n.a.

UW Time (s)

3.23 ± 0.61

3.18 ± 0.81

-0.51

-0.41

0.46 ± 0.61

n.a.

UW Distance (m)

7.26 ± 1.42

6.29 ± 1.68

-0.64

-0.57

0.97 ± 1.12^#

n.a.

Kick frequency (Hz)

2.52 ± 0.23

2.16 ± 0.19

-0.16

-0.46

0.36 ± 1.55^†

n.a.

Kick count (times)

7.00 ± 1.56

5.71 ± 2.09

-0.70^#

-0.55

1.29 ± 1.49^#

n.a.

Dec_kick (m·s^-2)

-0.51 ± 0.23

-0.36 ± 0.27

0.33

0.43

-0.16 ± 0.21^*

n.a.

Glide time (s)

0.40 ± 0.13

0.59 ± 0.27

0.56

0.33

-0.20 ± 0.20^#

n.a.

Initial-vx_head (m·s^-1)

4.60 ± 0.33

3.04 ± 0.16

0.03

-0.48

n.a.

F = 476.71^†
η²_P = 0.97

F = 438.07^†
η²_P = 0.97

F = 137.95^†
η²_P = 0.91

First-vx_head (m·s^-1)

2.70 ± 0.27

2.13 ± 0.21

-0.86^†

-0.59

n.a.

Last-vx_head (m·s^-1)

1.81 ± 0.15

1.70 ± 0.11

-0.55

-0.51

n.a.

Initial-vy_head (m·s^-1)

-1.51 ± 0.52

-0.39 ± 0.22

0.57

0.66

n.a.

F = 121.08^†
η²_P = 0.90

F = 49.47^†
η²_P = 0.79

F = 70.67^†
η²_P = 0.85

First-vy_head (m·s^-1)

0.11 ± 0.24

0.002 ± 0.16

0.69^#

0.39

n.a.

Last-vy_head (m·s^-1)

0.34 ± 0.10

0.25 ± 0.10

-0.50

-0.65

n.a.

Initial-BA (Ëš)

-14.63 ± 8.42

-6.93 ± 5.58

0.48

0.69^#

n.a.

F = 60.26^†
η²_P = 0.82

F = 1.12
η²_P = 0.08

F = 14.71^†
η²_P = 0.53

First-BA (Ëš)

7.57 ± 7.02

3.44 ± 6.78

0.70^#

0.46

n.a.

Last-BA (Ëš)

12.62 ± 5.34

11.43 ± 6.09

-0.29

-0.15

n.a.

T_0-15, 0-15 m time; T_25-35, 25-35 m time; UW, underwater; vx_mean, forward velocity; Dec_kick, the mean deceleration from the first to the last kick; Initial-vx_head, the forward head velocity at the feet entry or push-off; 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 or push-off; 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 or push-off; 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; η²_P, Partial eta squared.