Internal load in elite young soccer players during a whole season according to playing positions
- Match Intensity,
- Playing Time
The aims of this study were 1) to compare the internal load, measured as session rating of perceived exertion (s-RPE), between training sessions and official matches among playing positions in young elite soccer players and 2) to analyze the s-RPE association between training and official match-play. Nineteen young elite soccer players who competed in the Spanish First Division Under-19 Championship participated in this study. Internal load was registered during 120 training sessions and during 30 official matches. Only the players who participated in all the weekly sessions and played at least 70 min were included in the further analysis. No significant differences (P > 0.05, ES = -0.57/0.62) among playing positions were found in the s-RPE registered by soccer players in training sessions, official matches nor in the total sessions. On the other side, higher s-RPE was observed during trainings in comparison to matches in each playing position (P < 0.001, ES = 5.51-30.77). However, no association was observed between training s-RPE and match s-RPE for the whole of the players (P = 0.60, r = 0.04), nor for each specific playing positions (P = 0.29-0.89, r = -0.11/0.16). These findings could be useful for coaches in order to plan the distribution of the weekly training load. Nonetheless, it is also suggested that internal load monitoring cannot be confidently used, in isolation, as a tool to detect differences in the match-play demands, attending to playing positions, in young soccer players. Thus, the use of both internal (i.e., s-RPE) and external (i.e., global positioning system measures) load is suggested to manage the training and match load and to prescribe the training sessions appropriately.
- H. Alexiou, A.J. Coutts, A comparison of methods used for quantifying internal training load in women soccer players, International Journal of Sports Physiology and Performance, 3 (2008) 320–330.
- B.R. Scott, R.G. Lockie, T.J. Knight, A.C. Clark, X.A.K. Janse de Jonge, A comparison of methods to quantify the in-season training load of professional soccer players, International Journal of Sports Physiology and Performance, 8 (2013) 195–202.
- G.A. Borg, Perceived exertion: a note on “history” and methods, Medicine and Science in Sports and Exercise, 5 (1973) 90–93.
- A. Los Arcos, R. Martínez-Santos, J. Yanci, J. Mendiguchia, A. Méndez-Villanueva, Negative associations between perceived training load, volume and changes in physical fitness in professional soccer players, Journal of Sports Science and Medicine, 14 (2015) 394–401.
- M. Weston, Training load monitoring in elite English soccer: a comparison of practices and perceptions between coaches and practitioners, Science and Medicine in Football, 2 (2018) 216–224.
- A. Los Arcos, A. Mendez-Villanueva, R. Martínez-Santos, In-season training periodization of professional soccer players, Biology of Sport, 34 (2017) 149–155.
- J. Raya-González, F.Y. Nakamura, D. Castillo, J. Yanci, M. Fanchini, Determining the relationship between internal load markers and non-contact injuries in young elite soccer players, International Journal of Sports Physiology and Performance, 11 (2018) 1–19.
- Mujika, The alphabet of sport science research starts with Q, International Journal of Sports Physiology and Performance, 8 (2013) 465–466.
- T. J. Gabbett, The training-injury prevention paradox: should athletes be training smarter and harder?, British Journal of Sports Medicine, 12 (2016) 1–9.
- P.S. Bradley, M. Di Mascio, D. Peart, P. Olsen, B. Sheldon, High-intensity activity profiles of elite soccer players at different performance levels, Journal of Strength and Conditioning Research, 24(9) (2010) 2343–2351.
- M. Bush, C. Barnes, D.T. Archer, B. Hogg, P.S. Bradley, Evolution of match performance parameters for various playing positions in the English Premier League, Human Movement Science, 39 (2015) 1–11.
- L. Suarez-Arrones, N. Torreño, B. Requena, E. Sáez De Villarreal, D.Casamichana, J.C. Barbero-Alvarez, D. Munguía-Izquierdo, Match-play activity profile in professional soccer players during official games and the relationship between external and internal load, The Journal of Sports Medicine and Physical Fitness, 55 (2015) 1417–1422.
- A. Mendez-Villanueva, M. Buchheit, Football-specific fitness testing: adding value or confirming the evidence?, Journal of Sports Sciences, 31 (2013) 1503–1508.
- C. Carling, F. Le Gall, R.M. Malina, Body size, skeletal maturity, and functional characteristics of elite academy soccer players on entry between 1992 and 2003, Journal of Sports Sciences, 30 (2012) 1683–1693.
- D. Harriss, G. Atkinson, Ethical standards in sport and exercise science research: 2016 Update, International Journal of Sports Medicine, 36 (2015) 1121–1124.
- C. Foster, J.A. Florhaug, J. Franklin, L. Gottschall, L.A. Hrovatin, S. Parker, C. Dodge, A new approach to monitoring exercise training, Journal of Strength and Conditioning Research, 15 (2001) 109–115.
- A. Los Arcos, J. Yanci, J. Mendiguchia, E.M. Gorostiaga, Rating of muscular and respiratory perceived exertion in professional soccer players, Journal of Strength and Conditioning Research, 28 (2014) 3280–3288.
- A. Los Arcos, A. Méndez-Villanueva, J. Yanci, R. Martínez-Santos, Respiratory and muscular perceived exertion during official games in professional soccer players, International Journal of Sports Physiology and Performance, 11 (2016) 301–304.
- J. Cohen, Statistical power analysis for the behavioral sciences (2nd ed.), Hillsdale N.J.: L. Erlbaum Associates, (1988).
- W.G. Hopkins, S.W. Marshall, A.M. Batterham, J. Hanin, Progressive statistics for studies in sports medicine and exercise science, Medicine and Science in Sports and Exercise, 41 (2009) 3–13.
- V. Gesbert, A. Durny, D. Hauw, How do soccer players adjust their activity in team coordination? an enactive phenomenological analysis, Frontiers in Psychology, 8 (2017) 854.
- H. Al Haddad, B. M. Simpson, M. Buchheit, V. Di Salvo, A. Mendez-Villanueva, Peak match speed and maximal sprinting speed in young soccer players: effect of age and playing position, International Journal of Sports Physiology and Performance, 10 (2015) 888–896.