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Table 1

Means, standard deviations, effects, confidence limits, and null-hypothesis difference between means from anthropometric, countermovement jump performance indicators and qualitative data, between women’s RU backs and forwards.

Forwards
Mean ± SD
(n = 47)
Backs
Mean ± SD
(n = 39)
Difference
(Forwards – Backs)

Effecta 95%CL P-value
Age (years) 28 ± 5 26 ± 5 0.30 ± 0.42 0.16
Height (cm) 171 ± 6 166 ± 7 0.74 ± 0.43 0.001
Weight (kg) 83 ± 11 73 ± 8 1.10 ± 0.51 < 0.0001
Jump height (cm) 24.4 ± 4.2 28.7 ± 4.5 −0.72 ± 0.50 0.005
Reactive strength index (m ∙ s−1) 0.31 ± 0.08 0.36 ± 0.09 −0.62 ± 0.50 0.01
Peak force (N) 1015 ± 190 1003 ± 226 0.09 ± 0.51 0.74
Relative peak force (N ∙ kg−1) 12.3 ± 1.9 13.8 ± 2.7 −0.62 ± 0.51 0.02
Peak power (W) 3204 ± 373 3161 ± 437 0.12 ± 0.50 0.68
Relative peak power (W ∙ kg−1) 39.2 ± 4.8 43.8 ± 5.8 −0.84 ± 0.50 0.001
International RU experience, n=(%)
     ≥5years 28 (65) 23 (64)
     6–10years 8 (19) 9 (25)
     >10years 7 (16) 4 (11)
Competed in 7’s 14 (30) 30 (77)
Secondary position 30 (64) 29 (76)
Secondary position outside primary group 21 (45) 18 (47)
a

Effect sizes are that of the mean differences between positional groups.

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