Reliability and Validity of Integrated External and Internal Load Ratios as Measures of Fitness in Academy Rugby Union Players
| Autor: | Tony Myers, Dajo Sanders, Ibrahim Akubat, Richard J. Taylor |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Male
Multi-stage fitness test Adolescent Anaerobic Threshold Football Physical Therapy Sports Therapy and Rehabilitation 02 engineering and technology High-Intensity Interval Training Interval training Running 03 medical and health sciences 0302 clinical medicine Heart Rate Statistics Humans Aerobic exercise Orthopedics and Sports Medicine Lactic Acid Mathematics Lactate threshold Reproducibility of Results VO2 max Bayes Theorem 030229 sport sciences General Medicine 021001 nanoscience & nanotechnology Sprint Physical Fitness Exercise Test 0210 nano-technology Anaerobic exercise High-intensity interval training |
| Zdroj: | Journal of Strength and Conditioning Research. 34:1723-1730 |
| ISSN: | 1064-8011 |
| DOI: | 10.1519/jsc.0000000000002391 |
| Popis: | Taylor, RJ, Sanders, D, Myers, T, and Akubat, I. Reliability and validity of integrated external and internal load ratios as measures of fitness in academy rugby union players. J Strength Cond Res 34(6): 1723-1730, 2020-This study aimed to assess the relationships between integrated ratios of external and internal load measures and aerobic fitness in 3 different training exercise protocols. Twelve academy rugby union players (aged; 17.6 ± 0.44 years, height; 179.4 ± 6.3 cm, body mass 83.3 ± 9.7 kg) performed a lactate threshold/V[Combining Dot Above]O2max test (LT/V[Combining Dot Above]O2max) followed by 3 exercise protocols; 760 m continuous shuttle running (20 m shuttle run at 9 km·h), sprint interval training (SIT: 6 × 6 seconds sprint with 54 seconds recovery), and a small-sided game (SSG: 6 vs. 6, 10 minutes on a 39 × 51 m pitch) on 2 occasions. A LT/V[Combining Dot Above]O2max test was used to determine velocity at lactate threshold (vLT) and at the onset of blood lactate accumulation (vOBLA), maximal oxygen uptake (V[Combining Dot Above]O2max) and the heart rate-blood lactate profile for the calculation of internal load (individualized training impulse or iTRIMP). The total distance (TD), PlayerLoad, metabolic power (MP), high-speed distance >15 km·h (HSD), very high-speed distance >18 km·h (VHSD) and individualized high-speed distance based on each player's vOBLA (iHSD) for the 3 exercise protocols were measured using Micro Electro Mechanical Systems/Global Positioning System technology. Bayesian analysis was used to assess the ratios validity and reliability. Ratios demonstrated large-to-very large associations with vOBLA (Rho = 0.64-0.76), vLT (Rho = 0.63-0.71). Reliability of the ratios ranged from 7.06 to 36.28% (coefficient of variation [CV]%). The results suggest that integrated load ratios from the SIT and SSG protocols provide a measure which is reliable with large-to-very large associations to submaximal aerobic fitness in rugby union. |
| Databáze: | OpenAIRE |
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