The influence of` preseason training phase and training load on body composition and its relationship with physical qualities in professional junior rugby league players

References

• Argus, C. K., Gill, N., Keogh, J., Hopkins, W. G., & Beaven, C. M. (2010). Effects of a short-term pre-season training programmes on the body composition and anaerobic performance of professional rugby union players. Journal of Sport Science, 28(6), 697–686.
   PubMed Web of Science ®Google Scholar
• Batterham, A. M., & Hopkins, W. G. (2006). Making meaningful inference about magnitudes. International Journal of Sports Physiology and Performance, 1(1), 50–57.
   PubMed Web of Science ®Google Scholar
• Bradley, W. J., Cavanagh, B. P., Douglas, T. F., Morton, J. P., & Close, G. L. (2015). Quantification of training load, energy intake, and physiological adaptation during a rugby preseason: A case study from an elite European rugby union squad. Journal of Strength Conditioning Research, 29(2), 534–544.
   PubMed Web of Science ®Google Scholar
• Close, G. L., Hamilton, D. L., Phil, A., Burke, L. M., & Morton, J. P. (2016). New strategies in sport nutrition to increase exercise performance. Free Radical Biology and Medicine, 98, 144–158.
   PubMed Web of Science ®Google Scholar
• Comfort, P., Haigh, A., & Matthews, M. J. (2012). Are changes in maximal squad strength during preseason training reflected in changes in sprint performance in rugby league players? Journal of Strength Conditioning Research, 26(3), 772–776.
   PubMed Web of Science ®Google Scholar
• Darrall-Jones, J. D., Jones, B., & Till, K. (2015). Anthropometric and physical profiles of English academy ruby union players. Journal of Strength and Conditioning Research, 29(8), 2086–2096.
   PubMed Web of Science ®Google Scholar
• Delaney, J. A., Thornton, H. R., Scott, T. J., Ballard, D. A., Duthie, G. M., Wood, L. G., & Dascombe, B. J. (2016). Validity of skinfold-based measures for tracking changes in body composition in professional rugby league players. International Journal of Sports Physiology and Performance, 11, 261–266.
   PubMed Web of Science ®Google Scholar
• Dobbin, N., Hunwicks, R., Highton, J., & Twist, C. (2016). Validity of a jump mat for assessing countermovement jump performance in elite rugby players. International Journal of Sport Medicine, 38(2), 99–104.
   PubMed Web of Science ®Google Scholar
• Dobbin, N., Hunwicks, R., Highton, J., & Twist, C. (2017). Reliable testing battery for assessing physical qualities of elite academy rugby league players. Journal of Strength Conditioning Research, Advanced online publication. doi:10.1519/JSC.0000000000002280
   PubMed Web of Science ®Google Scholar
• Foster, C., Florhaug, J. A., Franklin, J., Gottschall, L., Hrovatin, L. A., Parker, S., … Dodge, C. (2001). A new approach to monitoring exercise training. Journal of Strength Conditioning Research, 15(1), 109–115.
   PubMed Web of Science ®Google Scholar
• Gabbett, T. J., & Domrow, N. (2007). Relationship between training load, injury, and fitness in sub-elite collision sports athletes. Journal of Sport Sciences, 23(13), 1507–1519.
   Web of Science ®Google Scholar
• Gabbett, T. J., Jenkins, D. G., & Abernethy, B. (2010). Physiological and anthropometric correlates of tackling ability in junior elite and subelite rugby league players. Journal of Strength and Conditioning Research, 24(11), 2989–2995.
   PubMed Web of Science ®Google Scholar
• Georgeson, E. C., Weeks, B. K., McLellan, C., & Beck, B. R. (2012). Seasonal change in body, muscle and fat in professional rugby league players and its relationship to injury: A cohort study. British Medical Journal Open, 2(6), e001400.
   PubMed Web of Science ®Google Scholar
• Gill-Rey, E., Lezaun, A., & Los Arcos, A. (2015). Quantification of the perceived training load and its relationship with changes in physical fitness performance in junior soccer players. Journal of Sport Science, 33(20), 2125–2132.
   PubMed Web of Science ®Google Scholar
• Harley, J. A., Hind, K., & O’Hara, J. P. (2011). Three-compartment body composition changes in elite rugby league players during a super league season, measured by dual-energy X-ray absorptiometry. Journal of Strength and Conditioning Research, 25(4), 1024–1029.
   PubMed Web of Science ®Google Scholar
• Hopkins, W. G. (2006). Spreadsheets for analysis of controlled trials with adjustment for a subject characteristic. Sportscience, 10, 46–50.
   Google Scholar
• Hopkins, W. G. (2015). Spreadsheets for analysis of validity and reliability. Sportscience, 19, 36–42.
   Google Scholar
• Johnston, R. D., Gabbett, T. J., & Jenkins, D. G. (2014). Applied sport science of rugby league. Sports Medicine, 44(8), 1087–1100.
   PubMed Web of Science ®Google Scholar
• Jones, B., Till, K., Barlow, M., Lees, M., O’Hara, J. P., & Hind, K. (2015). Anthropometric and three-compartment body composition differences between super league and championship rugby league players: Considerations for the 2015 season and beyond. PLoS One, 10(7), e0133188.
   PubMed Web of Science ®Google Scholar
• Jones, B., Till, K., Roe, G., O’Hara, J., Lees, M., Barlow, M. J., & Hind, K. (2017). Six-year body composition change in male elite senior rugby league players. Journal of Sport Science, Advanced online publication. doi:10.1080/02640414.2017
   Web of Science ®Google Scholar
• Jones, T. W., Smith, A., Macnaughton, L. S., & French, D. N. (2017). Strength and conditioning and concurrent training practices in elite rugby union. Journal of Strength and Conditioning Research, 30(12), 3354–3366.
   Web of Science ®Google Scholar
• McLaren, S. J., Smith, A., Spears, I. R., & Weston, M. (2017). A detailed quantification of differential rating of perceived exertion during team-sport training. Journal of Science and Medicine in Sport, 20(3), 290–295.
   PubMed Web of Science ®Google Scholar
• Morehen, J. C., Routledge, H. E., Twist, C., Morton, J. P., & Close, G. L. (2015). Position specific difference in the anthropometric characteristics of elite European super league rugby players. European Journal of Sport Science, 15(6), 523–529.
   PubMed Web of Science ®Google Scholar
• Morgan, P. J., & Callister, R. (2011). Effects of a preseason intervention on anthropometric characteristics of semiprofessional rugby league players. Journal of Strength and Conditioning Research, 25(2), 432–440.
   PubMed Web of Science ®Google Scholar
• Siri, W. E. (1956). Body composition from fluid spaces and density: Analysis of methods. University of California Radiation Laboratory Report, UCRL no. 3349. Berkeley, CA: University of California Radiation Laboratory.
   Google Scholar
• Slater, G. J., Duthie, G. M., Pyne, D. B., & Hopkins, W. G. (2006). Validation of a skinfold based index for tracking proportional changes in lean mass. British Journal of Sports Medicine, 40(3), 208–213.
   PubMed Web of Science ®Google Scholar
• Smart, D. J., & Gill, N. D. (2013). Effect of an off-season conditioning program on the physical characteristics of adolescent rugby union players. Journal of Strength and Conditioning Research, 27(3), 708–717.
   PubMed Web of Science ®Google Scholar
• Smith, D. R., Jones, B., Sutton, L., King, R. F., & Duckworth, L. C. (2016). Dietary intakes of elite 14- to 19-year-old academy rugby league players during a pre-season training period. International Journal of Sport Nutrition and Exercise Metabolism, 26(6), 506–515.
   PubMed Web of Science ®Google Scholar
• Till, K., Darrall-Jones, J., Weakley, J. J., Roe, G. A., & Jones, B. L. (2017). The influence of training age on the annual development of physical qualities within academy rugby league players. Journal of Strength and Conditioning Research, 31(8), 2110–2118.
   PubMed Web of Science ®Google Scholar
• Waldron, M., Worsfold, P., Twist, C., & Lamb, K. (2014). Changes in anthropometry and performance, and their interrelationships, across three seasons in elite youth rugby league players. Journal of Strength and Conditioning Research, 28(11), 3128–3136.
   PubMed Web of Science ®Google Scholar
• Walsh, M., Cartwright, L., Corish, C., Sugrue, S., & Wood-Martin, R. (2011). The body composition, nutritional knowledge, attitudes, behaviours, and future education needs of senior schoolboy rugby players in Ireland. International Journal of Sport Nutrition and Exercise Metabolism, 21(5), 365–376.
   PubMed Web of Science ®Google Scholar
• Weakley, J. J., Till, K., Darrall-Jones, J., Roe, G. A., Phibbs, P. J., Read, D., & Jones, B. L. (2017). Strength and conditioning practices in adolescent rugby players: Relationship with changes in physical qualities. Journal of Strength Conditioning Research, Advanced online publication. doi:10.1519/JCS.0000000000001828
   Web of Science ®Google Scholar
• Withers, R. T., LaForgia, J., Phillans, R. K., Shipp, N. J., Chatterton, B. E., Schultz, C. G., & Leaney, F. (1985). Comparisons of two-, three-, and four-compartment models of body composition analysis in men and women. Journal of Applied Physiology, 85(1), 238–245.
   Web of Science ®Google Scholar