Skip to main content

Table 1 Group comparisons for demographic characteristics and SCRuM test items by playing standards

From: Qualities or skills discriminating under 19 rugby players by playing standards: a comparative analysis of elite, sub-elite and non-rugby players using the SCRuM test battery

  Elite
[1]
(n = 41)
Sub-elite
[2]
(n = 46)
Non-rugby
[3]
(n = 21)
One-way ANOVA [1] vs [2].
ES
[1] vs [3]
ES
[2] vs. [3]
ES
  Mean ± SD Mean ± SD Mean ± SD F P Posthoc d d d
Age (yrs) 17.5 ± 0.85 17.4 ± 0.87 17.6 ± 0.81 0.14 0.87   0.12 0.12 0.24
Playing exp. (yrs) 4.95 ± 0.74 4.89 ± 0.67 4.74 ± 0.38 1.56 0.24   0.09 0.36 0.28
APHV (yrs) 15.6 ± 0.60 15.8 ± 0.13 15.8 ± 0.58 1.21 0.30   0.46 0.34 0.00
Maturity offset (yrs) 1.93 ± 0.53 1.64 ± 0.97 1.78 ± 0.56 1.61 0.21   0.37 0.28 0.18
Anthropometric tests
 Body mass (kg) 77.5 ± 9.58 75.9 ± 11.6 68.5 ± 9.47 5.40 0.006* 1, 2 > 3 0.15 0.94a 0.70a
 Height (m) 1.73 ± 0.06 1.72 ± 0.08 1.71 ± 0.06 0.30 0.74   0.14 0.33 0.14
 Biceps (mm) 6.71 ± 3.62 6.60 ± 3.14 6.57 ± 2.27 0.02 0.98   0.03 0.05 0.01
 Triceps (mm) 9.44 ± 2.95 9.83 ± 4.58 8.36 ± 2.69 1.15 0.32   0.10 0.38 0.39
 Subscapul. (mm)wg 12.8 ± 2.74 13.5 ± 4.64 11.2 ± 2.64 3.73 0.03* 2 > 3 0.18 0.59 0.61a
 Suprailiac (mm) 8.93 ± 3.84 9.51 ± 3.93 9.52 ± 1.98 0.34 0.71   0.15 0.19 0.00
 Abdomen (mm)w 11.4 ± 2.85 13.3 ± 5.90 11.8 ± 2.41 1.79 0.18   0.45 0.15 0.33
 Thigh (mm) 9.98 ± 2.48 11.0 ± 4.83 9.08 ± 2.00 2.86 0.07   0.27 0.40 0.52
 Calf (mm)w 5.49 ± 1.03 6.11 ± 2.07 6.17 ± 1.29 3.08 0.05   0.38 0.58 0.03
 Sum of SKF (mm)w 64.7 ± 15.6 69.8 ± 24.4 62.7 ± 11.6 1.30 0.28   0.25 0.15 0.37
Physiological tests
 20 m speed (s) 3.25 ± 0.17 3.36 ± 0.23b 3.47 ± 0.25 8.30 < 0.001* 1 < 2, 3 0.54 1.03a 0.46
 40 m speed (s) 5.60 ± 0.29 5.84 ± 0.40b 6.10 ± 0.27 16.2 < 0.001* 1 < 2, 3; 2 < 3 0.69a 1.78a 0.76a
 L-run test (s) 6.21 ± 0.32 6.33 ± 0.33b 6.43 ± 0.25 3.65 0.03* 1 < 3 0.37 0.77a 0.34
 VJtest (cm) 47.8 ± 3.81 42.5 ± 3.84b 44.4 ± 3.85 20.5 < 0.001* 1 > 2, 3 1.39a 0.89a 0.49
 2 kg MBCT test (m) 9.23 ± 1.26 8.31 ± 1.18 7.18 ± 1.16 20.4 < 0.001* 1 > 2, 3; 2 > 3 0.75a 1.69a 0.97a
 60 s Push Up (n) 49.7 ± 9.97 43.9 ± 12.0 38.2 ± 6.50 8.95 < 0.001* 1 > 2, 3 0.53 1.37a 0.59
 WSLS test (s)wg 146.0 ± 9.72 137.5 ± 21.7 132.6 ± 7.41 18.3 < 0.001* 1 > 2, 3 0.51 1.55a 0.30
 1RM BS test (kg) 98.4 ± 14.8 89.5 ± 16.3 2.68c 0.009*   0.57
 Relative BS (kg/kg−1) 1.27 ± 0.04 1.17 ± 0.06 8.77c < 0.001*   1.96a
 1RM BP test (kg) 90.5 ± 16.4 80.6 ± 15.9 2.86c 0.005*   0.61a
 Relative BP (kg/kg−1) 1.16 ± 0.08 1.06 ± 0.06 6.98c < 0.001*   1.41a
 RHIE 1st sprint test (s) 10.2 ± 0.77 10.5 ± 0.81b 1.87c 0.07   0.38
 RHIE 2nd sprint test (s) 13.0 ± 1.02 13.2 ± 0.96b 0.76c 0.45   0.20
 RHIE 3rd sprint test (s) 16.1 ± 1.49 18.2 ± 1.64b 6.32c < 0.001*   1.34a
 RHIE total sprint test (s) 39.3 ± 2.96 41.9 ± 2.97b 4.04c < 0.001*   0.88a
 Decrement in RHIE (s) 5.92 ± 1.17 7.76 ± 1.31b 6.81c < 0.001*   1.48a
 Yo–Yo IRT (m)wg 1505.9 ± 75.8 1443.6 ± 259.1b 1053.3 ± 148.8 84.5 < 0.001* 1, 2 > 3 0.33 3.83a 1.85a
Rugby-specific tests
 Tackling test (%) 87.9 ± 8.44 84.8 ± 8.16 1.77c 0.08   0.37
 Passing ability test (au)wg 116.2 ± 2.13 113.0 ± 4.07 4.60c < 0.001*   0.99a
 Catching ability test (au)wg 74.0 ± 1.07 73.5 ± 1.35 1.98c 0.05   0.41
  1. [1], Elite group; [2], Sub-elite group; [3], Non-rugby group; Playing exp., Number of years playing competitive schoolboy sport either rugby or cricket; Subscapul. (mm), Subscapular (mm); SKF, Skinfolds; catching ability, running and catching ability test expressed in arbitrary units; SD, standard deviation; F, F test for ANOVA reporting the p value; wg, Welch F test reported and Games Howell test used for the post hoc analysis; w, Welch test results reported because of a significant Levene’s test result based on the mean; 2 kg MBCT, 2 kg medicine ball chest throw test; WSLS, Wall sit leg strength test; Yo–Yo IRT, Yo–Yo intermittent recovery test; Tackling proficiency (%), Tackling test expressed as a percentage; 1RM, one repetition maximum; 1RM BS and BP, one repetition maximum bench squat and press respectively; RHIE, repeated high intensity exercise test measured in seconds; no cricket players were allowed to perform 1RM BP, 1RM BS and RHIE because of lack of training exposure to these physically demanding tests; au, arbitrary units
  2. a Denotes moderate to large effect sizes for within age-group comparison using the Cohen d; d, effect size APHV, predicted age at peak height velocity based on prediction equations reflecting the estimated age at maximal velocity of growth in height during the adolescent spurt; Maturity offset (years), predicted years before or after age peak height velocity (APHV). The chronological age (CA) at prediction minus offset provides an estimate of APHV; VJ test, vertical jump test
  3. b, sample size was 44 for the specified running tests
  4. c, t-test independent samples test results comparing two groups; Posthoc, refers to the Scheffe or games Howell test results; Decrement in RHIE, Decrement in RHIE sprint performance calculated as the difference in time taken (seconds) to complete the third set of sprints (sprints 7–9) compared with the total time taken to complete the first set of 3 sprints (sprints 1 − 3) denoting fatigue time; d sample size was 26 for the respective tests; ES, effect size; One-way ANOVA, one way analysis of variance
  5. * Significant p values for the ANOVA F test; 5 m speed, 10 m speed, sit and reach tests and passing for accuracy tests were found unreliable in a preliminary study involves two repeated measures. U19 cricket players did not perform game skills due to the physically and technically demanding nature of these tests and local cricket coaches’ had reservations on U19 cricket players performing rugby-oriented technical skills
\