The Training Load Indices in Professional Soccer Players: Pre-Season Index of Overall Demand

Document Type : Original research papers


1 Department of Sports Physiology,University of mohaghegh Ardabili, Ardabil, Iran.

2 Department of Sports Physiology,University of mohaghegh Ardabili, Ardabil, Iran


The index of overall demand as an output of the training factors (volume, intensity and density), is an all-around index for assessment of training loading pattern. The aim of this study was to investigate the index of overall demand in Iranian premier league professional soccer players during pre-season phase of annual plan. Nineteen professional soccer players (age mean and SD: 25.1 ± 0.6 years, height mean and SD: 176.5 ± 0.78 centimetres, weight mean and SD: 80.5 ± 8.54 kilograms) belonging to an Iranian professional soccer team, participated in this study. All players included participated in the pre-season. For this longitudinal study, training load data were collected over a 4-week period during pre-season. The GPS system with the 15 Hz MEMS was used in all the training sessions. Additionally, flashing RED light was used to track HR. Higher training duration were showed in the microcycle 1 compare to the microcycle 4. The relative as well as the absolute volume of the training decreased from the first to the fourth microcycles, On the contrary, the partial and overall training intensity increased during the pre-season phase. We showed no significant changes in the relative and the absolute density of the training. The index of overall demand as an all-around index of training loading pattern decreased from the first to the third microcycles, while it increased in the fourth microcycle. According to our findings the volume, intensity and density of training are three key factors in training and optimal adaptation to these components leads to the improvement of performance. The index of overall demand as a training main variable reflects the actual training load. The index of overall demand, help coaches to manage the training load of athletes.


Main Subjects

  1. Akenhead, R., J.A. Harley, and S.P. Tweddle, Examining the external training load of an English Premier League football team with special reference to acceleration. Journal of strength and conditioning research. 2016; 30(9): 2424-2432.
  2. Stone, M. H., Hornsby, W. G., Haff, G. G., Fry, A. C., Suarez, D. G., Liu, J. Periodization and block periodization in sports: emphasis on strength-power training—a provocative and challenging narrative. The Journal of Strength & Conditioning Research. 2021; 35(8): 2351-2371.
  3. Buchheit, M., Monitoring training status with HR measures: do all roads lead to Rome? Frontiers in physiology. 2014; 5: 73.
  4. Thorpe, R. T., Strudwick, A. J., Buchheit, M., Atkinson, G., Drust, B., & Gregson, W. The influence of changes in acute training load on daily sensitivity of morning-measured fatigue variables in elite soccer players. International journal of sports physiology and performance. 2017; 12(s2): S2-107-113.
  5. Smith, D.J., A framework for understanding the training process leading to elite performance. Sports medicine. 2003; 33(15): 1103-1126.
  6. Häkkinen, K. and E. Myllylä, Acute effects of muscle fatigue and recovery on force production and relaxation in endurance, power and strength athletes. The Journal of sports medicine and physical fitness. 1990; 30(1): 5-12.
  7. Hamada, T., D.G. Sale, and J.D. Macdougall, Postactivation potentiation in endurance-trained male athletes. Medicine and science in sports and exercise. 2000; 32(2): 403-411.
  8. Brughelli, M., J. Cronin, and A. Chaouachi, Effects of running velocity on running kinetics and kinematics. The Journal of Strength & Conditioning Research. 2011; 25(4): 933-939.
  9. Locatelli, E., The importance of anaerobic glycolysis and stiffness in the sprints (60, 100 and 200 metres), New Stud. Athlet. 1996; 11(3): 121-125.
  10. Miller, R. G., Moussavi, R. S., Green, A. T., Carson, P. J., & Weiner, M. W. The fatigue of rapid repetitive movements. Neurology. 1993; 43(4): 755-755.
  11. Esteve-Lanao, J., Foster, C., Seiler, S., & Lucia, A. Impact of training intensity distribution on performance in endurance athletes. The Journal of Strength & Conditioning Research. 2007; 21(3): 943-949.
  12. Fonseca, T. R., Mendes, T. T., Ramos, G. P., Cabido, C. E. T., Morandi, R. F., Ferraz, F. O., Teixeira, M. M.  Aerobic training modulates the increase in plasma concentrations of cytokines in response to a session of exercise. Journal of environmental and public health. 2021; 5: 54-68
  13. Halson, SL., Monitoring training load to understand fatigue in athletes. Sports Medicine. 2014; 44 (2): 139–147.
  14. Anta RC, Esteve-Lanao J., Training load quantification in triathlon. Journal of human Sport & Exercise. 2011; (6): 218-232
  15. Iernan, C., Comyns, T., Lyons, M., Nevill, A. M., & Warrington, G. The association between training load indices and injuries in elite soccer players.  Journal of Strength and Conditioning Research. 2022; (36): 122-131.
  16. Sip, R. and I. Burešová, Does personality matter when we are approaching the subjective perception of overtraining among adolescents? Studia sportiva. 2020; 14(1): 58-66.
  17. Meeusen, R., Duclos, M., Foster, C., Fry, A., Gleeson, M., Nieman, D., Urhausen, A. Prevention, diagnosis and treatment of the overtraining syndrome: Joint consensus statement of the European College of Sport Science (ECSS) and the American College of Sports Medicine (ACSM). European Journal of Sport Science. 2013; 13(1): 1-24.
  18. Williams, J.H. and E. Tessaro, Validity and reliability of a 15 Hz GPS device for court-based sports movements. 2018; 56: 159-171
  19. Clemente, F. M., Couceiro, M. S., Martins, F. M. L., Ivanova, M. O., & Mendes, R. Activity profiles of soccer players during the 2010 world cup. Journal of human kinetics. 2013; 38(2013): 201-211.
  20. Nobari, H., Oliveira, R., Brito, J. P., Pérez-Gómez, J., Clemente, F. M., & Ardigò, L. P. Comparison of running distance variables and body load in competitions based on their results: a full-season study of professional soccer players. International Journal of Environmental Research and Public Health. 2021; 18(4): 2077.
  21. Suchomel, T. J., Wagle, J. P., Douglas, J., Taber, C. B., Harden, M., Haff, G. G., & Stone, M. H. Implementing eccentric resistance training—part 2: practical recommendations. Journal of Functional Morphology and Kinesiology. 2019; 4(3): 55.
  22. Stone, M.H., M. Stone, and W.A. Sands, Principles and practice of resistance training. 2007: 4: 39-42.
  23. Wernbom, M., J. Augustsson, and R. Thomeé, The influence of frequency, intensity, volume and mode of strength training on whole muscle cross-sectional area in humans. Sports medicine. 2007; 37: 225-264.
  24. Abadejev, I., Basic training principles for Bulgarian elite. Canadian Weightlifting Federation Official Newsletter. 1976; 5: 13-18.
  25. Jones, L.D., Bulgarian methods lead the way for USA. Weightlift USA. 1991; 9: 10-11.
  26. Häkkinen, K.a. and M. Kallinen, Distribution of strength training volume into one or two daily sessions and neuromuscular adaptations in female athletes. Electromyography and clinical neurophysiology. 1994; 34(2): 117-124.
  27. Fiskerstrand, Å. and K. Seiler, Training and performance characteristics among Norwegian international rowers 1970–2001. Scandinavian journal of medicine & science in sports. 2004; 14(5): 303-310.
  28. Pugliese, L., Porcelli, S., Bonato, M., Pavei, G., La Torre, A., Maggioni, M. A., Marzorati, M. Effects of manipulating volume and intensity training in masters swimmers. International Journal of Sports Physiology and Performance. 2015; 10(7): 907-912.
  29. Jones, P. and T.M. Bampouras, Resistance training for distance running: a brief update. Strength & Conditioning Journal. 2007; 29(1): 28-35.
  30. Baechle, T.R. and R.W. Earle, Essentials of strength training and conditioning. 2008: Human kinetic
  31. Terrazas, L., Effects of Manual Resistance Training on Body Composition in Young Adults. 2020, The University of Texas at El Paso.
  32. Zatsiorsky, V.M., Intensity of strength training: Facts and theory Russian and eastern European approach. National Strength and Conditioning Association Journal. 1992; 14: 40-40.
  33. Zatsiorsky, V.M., W.J. Kraemer, and A.C. Fry, Science and practice of strength training. 2020: Human Kinetics.
  34. Seiler, S., What is best practice for training intensity and duration distribution in endurance athletes? International journal of sports physiology and performance. 2010; 5(3): 276-291.
  35. Asghari, E. and A. Damirchi, A comparison between Effects Of high intensity and high volume training on lactate accumulation, time performance and vo2peak in 10-14 year old distance runners. Journal of Sport Biosciences. 2013; 5(3): 29-40.
  36. Conley, M., Bioenergetics of exercise and training. Essential Principles of Strength and Conditioning (2nd ed). Baechle T and Earle R, eds. Champaign, IL: Human Kinetics. 2000; 9: 88.
  37. Siff, M. and Y. Verkhoshansky, Supertraining Supertraining International. 1999, Denver, Colorado.
  38. Haff, G.G., A. Whitley, and J.A. Potteiger, A brief review: Explosive exercises and sports performance. Strength & Conditioning Journal. 2001; 23(3): 13.
  39. Spencer, M., Bishop, D., Dawson, B., & Goodman, C. Physiological and metabolic responses of repeated-sprint activities: specific to field-based team sports. Sports medicine. 2005; 35: 1025-1044.
  40. Arne, G., S. Stephen, and E. Eike, Training methods and intensity distribution of young world-class rowers. International journal of sports physiology and performance. 2009; 4(4): 448-460.
  41. Borges, T. O., Moreira, A., Thiengo, C. R., Medrado, R. G. S. D., Titton, A., Lima, M. R., Aoki, M. S. Training intensity distribution of young elite soccer players. Revista Brasileira de Cineantropometria & Desempenho Humano. 2019; 21.
  42. Laursen, P.B., Training for intense exercise performance: high‐intensity or high‐volume training? Scandinavian journal of medicine & science in sports. 2010; 20: 1-10.
  43. Siahkouhian, M., Fasihi, L., Valizadeh, A., & Naghizadeh, A. Quantification of the relationships between volume and intensity of exhaustive treadmill running in active young men. Journal of Sport and Biomotor Sciences. 2018; 19(19): 29-38.
  44. Stølen, T., Chamari, K., Castagna, C., & Wisløff, U. Physiology of soccer: an update. Sports medicine. 2005; 35: 501-536.
  45. Gabbett, T.J., Science of rugby league football: a review. Journal of sports sciences. 2005; 23(9): 961-976.
  46. Bridge, C. A., Ferreira da Silva Santos, J., Chaabene, H., Pieter, W., & Franchini, E. Physical and physiological profiles of taekwondo athletes. Sports Medicine. 2014; 44: 713-733.
  47. Pietraszewski, B. and A. Rutkowska-Kucharska, Relative power of lower limbs in drop jump. Acta Bioeng. Biomech. 2011; 13(1): 13-18.
  48. Bober, T., Rutkowska-Kucharska, A., Pietraszewski, B., & Lesiecki, M. Biomechanical criteria for specifying the load applied in plyometric training in basketball. Research Yearbook. 2006; 12(2): 227-231.
  49. Maud, P.J. and C. Foster, Physiological assessment of human fitness. Human Kinetics. 2006; 56.
  50. Reed, C. A., Ford, K. R., Myer, G. D., & Hewett, T. E. The effects of isolated and integrated ‘core stability’training on athletic performance measures: a systematic review. Sports medicine. 2012; 42: 697-706.
  51. Carling, C., T. Reilly, and A.M. Williams, Performance assessment for field sports. Routledge. 2008; 155