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Table 1 Characteristics of the tennis players by level of training experience

From: Side differences in upper quarter mobility/stability are not related to serve velocity in tennis players with different levels of training experience

Characteristic

All players (N = 42)

YoT < 2 (n = 14)

YoT 2–5 (n = 17)

YoT 6–8 (n = 11)

p-value (ƞp2)

Sex [f/m]

16/24

3/11

5/12

8/3

Age [years]

23.9 ± 9.3

22.7 ± 10.0

23.9 ± 11.0

25.5 ± 4.7

0.772 (0.01)

Body height [cm]

177.6 ± 8.5

180.2 ± 7.6

176.6 ± 9.9

176.0 ± 6.9

0.383 (0.05)

Body mass [kg]

71.4 ± 11.1

71.8 ± 10.8

72.7 ± 12.4

68.5 ± 9.8

0.622 (0.02)

Body mass index [kg/m2]

22.5 ± 2.4

22.1 ± 2.6

23.1 ± 2.5

22.0 ± 2.1

0.371 (0.05)

Stroke arm [l/r]

3/39

0/14

0/17

3/8

Stroke arm length [cm]

90.6 ± 4.3

92.1 ± 3.6

89.9 ± 4.6

90.0 ± 4.5

0.242 (0.07)

Non-stroke arm length [cm]

89.4 ± 4.5

91.1 ± 3.8

88.7 ± 4.5

88.5 ± 5.1

0.015 (0.19)

  1. Values are expressed as mean ± standard deviation. Figures in brackets are effect sizes (ηp2) with 0.02 ≤ ηp2 ≤ 0.12 indicating small, 0.13 ≤ ηp2 ≤ 0.25 indicating medium, and ηp2 ≥ 0.26 indicating large effects. f: female; l: left; m: male, r: right, YoT: years of training