The validity and contributing physiological factors to 30-15 intermittent fitness test performance in Rugby League
Journal article
Scott, Tannath J., Duthie, Grant M., Delaney, Jace A., Sanctuary, Colin E., Ballard, David A., Hickmans, Jeremy A. and Dascombe, Ben. (2017). The validity and contributing physiological factors to 30-15 intermittent fitness test performance in Rugby League. Journal of Strength and Conditioning Research. 31(9), pp. 2409 - 2416. https://doi.org/10.1519/JSC.0000000000001702
Authors | Scott, Tannath J., Duthie, Grant M., Delaney, Jace A., Sanctuary, Colin E., Ballard, David A., Hickmans, Jeremy A. and Dascombe, Ben |
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Abstract | Abstract: Scott, TJ, Duthie, GM, Delaney, JA, Sanctuary, CE, Ballard, DA, Hickmans, JA, and Dascombe, BJ. The validity and contributing physiological factors to 30-15 intermittent fitness test performance in rugby league. J Strength Cond Res 31(9): 2409-2416, 2017-This study examined the validity of the 30-15 Intermittent Fitness Test (30-15IFT) within rugby league. Sixty-three Australian elite and junior-elite rugby league players (22.5 +/- 4.5 years, 96.1 +/- 9.5 kg, [SIGMA]7 skinfolds: 71.0 +/- 18.7 mm) from a professional club participated in this study. Players were assessed for anthropometry (body mass, [SIGMA]7 skinfolds, lean mass index), prolonged high-intensity intermittent running (PHIR; measured by 30-15IFT), predicted aerobic capacity (MSFT) and power (AAS), speed (40 m sprint), repeated sprint, and change of direction (COD-505 agility test) ability before and after an 11-week preseason training period. Validity of the 30-15IFT was established using Pearson's coefficient correlations. Forward stepwise regression model identified the fewest variables that could predict individual final velocity (VIFT) and change within 30-15IFT performance. Significant correlations between VIFT and [SIGMA]7 skinfolds, repeated sprint decrement, V[Combining Dot Above]O2maxMSFT, and average aerobic speed were observed. A total of 71.8% of the adjusted variance in 30-15IFT performance was explained using a 4-step best fit model (V[Combining Dot Above]O2maxMSFT, 61.4%; average aerobic speed, 4.7%; maximal velocity, 4.1%; lean mass index, 1.6%). Across the training period, 25% of the variance was accounted by [DELTA]V[Combining Dot Above]O2maxMSFT (R2 = 0.25). These relationships suggest that the 30-15IFT is a valid test of PHIR within rugby league. Poor correlations were observed with measures of acceleration, speed, and COD. These findings demonstrate that although the 30-15IFT is a valid measure of PHIR, it also simultaneously examines various physiological capacities that differ between sporting cohorts. |
Keywords | intensity interval training; testing; team sports |
Year | 2017 |
Journal | Journal of Strength and Conditioning Research |
Journal citation | 31 (9), pp. 2409 - 2416 |
Publisher | NSCA National Strength and Conditioning Association |
ISSN | 1064-8011 |
Digital Object Identifier (DOI) | https://doi.org/10.1519/JSC.0000000000001702 |
Scopus EID | 2-s2.0-85028669561 |
Page range | 2409 - 2416 |
Research Group | Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre |
Publisher's version | File Access Level Controlled |
Place of publication | United States of America |
https://acuresearchbank.acu.edu.au/item/85566/the-validity-and-contributing-physiological-factors-to-30-15-intermittent-fitness-test-performance-in-rugby-league
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