Abstract
There are profound fluctuations in climate that occur within the annual cycle of seasonal changes. The severity of these changes depends on latitude of location and prevailing topography. Living creatures have evolved means of coping with seasonal extremes. Endogenous circannual cycles, at least in humans, appear to have been masked by mechanisms employed to cope with environmental changes. Physical activity levels tend to be lower in winter than in summer, mediating effects on health-related fitness. In athletes, seasonal changes are dictated by requirements of the annual programme of competitive engagements rather than an inherent circannual rhythm. Injury rates are influenced by seasonal environmental factors, notably in field sports. Season of birth has been related to susceptibility to selected morbidities, including mental ill-health. In age-restricted sports, there is a date-of-birth bias favouring those individuals born early in the competitive year. Trainers and selectors should acknowledge this trend if they are to avoid omitting gifted individuals, born later in the year, from talent development programmes.
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References
Dincauze DF. Environmental archaeology: principles and practice. Cambridge: Cambridge University Press, 2000
Rial JA. Earth’s orbital eccentricity and the rhythm of the Pleistocene ice ages: the concealed pacemaker. Glob Planet Change 2004; 41 (2): 81–93
Calvin WH. A brain for all seasons: human evolution and abrupt climate change. Chicago (IL): University of Chicago Press, 2000
Ulijaszek SJ, Strickland SS. Seasonality and human ecology. In: Ulijaszek SJ, Strickland SS, editors. 35th Symposium Volume for the Society for the Study of Human Biology; 1992 Apr 9–10; Cambridge. Cambridge: Cambridge University Press, 1993
Strahler AH. Introducing physical geography. New York: John Wiley and Sons, 2003
Paulson D. Biomes of the world [online]. In: University of Puget Sound. Available from URL: http://www.ups.edu/biology/mu-seum/worldbiomes.html [Accessed 1996]
Reilly T, Waterhouse J. Sport, exercise and environmental physiology. Edinburgh: Elsevier, 2005
Thompson GE. Physiological effects of cold exposure. In: Robertshaw D, editor. Environmental physiology II. Baltimore (MD): University Park Press, 1977: 29–69
Small C, Cohen JE. Continental physiography, climate and the global distribution of human population [online]. Available from URL: http://www.rockerfeller.edu/labheads/cohenje/ PDFs/285S mallcohen.pdf [Accessed 2005 Jan 17]
Foley RA. The influence of seasonality on hominid evolution. In: Ulijaszek SJ, Strickland SS, editors. Seasonality and human ecology: 35th Symposium Volume of the Society for the Study of Human Biology; 1992 Apr 9–10; Cambridge. Cambridge: Cambridge University Press, 1993: 17–37
Bromage TG. Biogeographic and climatic basis for a narrative of early hominid evolution. J Hum Evol 1995; 28: 109–114
Potts R. Variability selection in hominid evolution. Evol Anthropol 1998; 7: 81–96
Bercoviteh FB, Harding RS. Annual birth patterns of savanna baboons (Papio cynocephalus anubis) over a ten-year period at Gilgil, Kenya. Folia Primatol (Basel) 1993; 61: 115–122
Smolensky MH. Chronoepidemiology: chronobiology and epidemiology. In: Touitou Y, Haus E, editors. Biological rhythms in clinical and laboratory medicine. Berlin: Springer Verlag, 1992: 659–672
Wehdahl A. Covariance of daylight, sport participation and sleep patterns. Prog Clin Biol Res 1990; 34IB: 306–311
Erikssen J, Rodahl K. Seasonal variation in work performance and heart rate responses to exercise: a study of 1835 middle-aged men. Eur J Appl Physiol 1979; 42: 133–140
Ingleman-Hansen T, Halkjaer-Kristensen J. Seasonal variation of maximal oxygen consumption rate in humans. Eur J Appl Physiol 1982; 49: 151–157
Uitenbroek DG. Seasonal variation in leisure time physical activity. Med Sci Sports Exerc 1993; 25: 755–760
Reilly T, Atkinson G, Waterhouse J. Biological rhythms and exercise. Oxford: Oxford University Press, 1997
Addo-Yobo EO, Castovic A, Taggart SC, et al. Seasonal variability in exercise test responses in Ghana. Can Assoc Health Phys Educ Recr J 2002; 51: 23–28
Voltaire B, Berthouze-Arondas S, Hue O. Influence of a hot/wet environment on exercise performance in natives to a tropical climate. J Sports Med Phys Fitness 2003; 43: 306–311
Peiser B, Reilly T. Environmental factors in the summer Olympics in historical perspective. J Sports Sci 2004; 22: 981–1002
Matveyev L. Fundamentals of sports training. Moscow: Progress Publishers, 1981
Reilly T, Thomas V. Effects of a programme of pre-season training on the fitness of soccer players. J Sports Med Phys Fitness 1977; 17 (4): 401–412
Hakkinen K. Changes in physical fitness profile in female volleyball players during the competitive season. J Sports Med Phys Fitness 1993; 33: 223–232
Brady K, Maile A, Ewing B. An investigation into the fitness of professional soccer players over two seasons. In: Reilly T, Bangsbo J, Hughes M, editors. Science and Football IU. London: E and FN Spon, 1997: 118–122
Reilly T, Thomas V. The stability of fitness factors over a season of professional soccer as indicated by serial factor analyses. In: Ostyn M, Beunen G, Simons J, editors. Kinanthropometry II. Baltimore (MD): University Park Press, 1980: 247–257
White JE, Emery TM, Kane JE, et al. Pre-season fitness profiles of professional soccer players. In: Reilly T, Lees A, Davids K, et al., editors. Science and football. London: E and FN Spon, 1988: 164–171
Thomas V, Reilly T. Changes in fitness profiles during a season of track and field training and competition. Br J Sports Med 1976; 10 (4): 217–222
Egan E, Reilly T, Chantler P, et al. Body composition before and after six weeks pre-season training in professional football players. In: Marfell-Jones M, Stewart A, editors. Kinanthropometry IX. London: Routledge, 2006
Casajus J A. Seasonal variation in fitness variables in professional soccer players. J Sports Med Phys Fitness 2001; 41: 463–469
McClanahan BS, Ward KD, Vukadinovich C, et al. Bone mineral density in triathletes over a competitive season. J Sports Sci 2002; 20: 463–469
Nowak A, Szczesniak L, Krutki P, et al. Bone turnover markers during the annual training cycle in athletes. Biol Sport 2002; 19: 227–237
Reilly T, Bangsbo J. Anaerobic and aerobic training. In: Elliott B, editor. Training in sport: applying sport science. Chichester: John Wiley, 1998: 351–409
Hoff J, Helgerud J. Endurance and strength training for soccer players: physiological considerations. Sports Med 2004; 34: 165–180
Reilly T, White C. Small-sided games as an alternative to interval-training for soccer players. In: Reilly T, Cabri J, Araujo D, editors. Science and football V. London: Routledge, 2005: 344–347
Malm C, Ekblom O, Ekblom B. Immune function alterations in response to increased physical training during a five day soccer training camp. Int J Sports Med 2004; 25: 471–476
Healy JD. Excess winter mortality in Europe: a cross country analysis identifying key risk factors. J Epidemiol Commun Health 2003; 57: 784–789
Pell JP, Cobbe SM. Seasonal variations in coronary heart disease. Q J Med 1999; 92: 689–696
Muller D, Elahi D, Tobin J, et al. The effect of age on insulin resistance and sercretion: a review. Semin Nephrol 1997; 16: 289–298
Donaldson GC, Ermakov SP, Komarov YM, et al. Cold related mortalities and protection from cold in Yakutsk, eastern Siberia. BMJ 1998; 317: 978–982
Saltin B, Blomqvist G, Mitchell JH, et al. Response to exercise after bed rest and after training: a longitudinal study of the effects of training on risk factors for coronary disease in men. Am J Med 196; 46: 12-27
Magnus K, Matroos A, Stracker J. Walking, cycling or gardening, with or without seasonal interruption, in relation to acute coronary events. Am J Epidemiol 1979; 110: 724–733
Atkinson G, Drust B. Seasonal rhythms and exercise. Clin Sports Med 2005; 24: 25–34
Stewart S, Mclntyre K, Capewell S, et al. Heart failure in a cold climate: seasonal variation in heart-failure related morbidity and mortality. J Am Coll Cardiol 2002; 39: 760–766
Rockville LS. Effects of seasonal mood changes on seasonal variations in coronary heart disease: role of immune system, infection and inflammation. Med Hypotheses 2001; 56 (1): 104–106
Group TE. Cold exposure and winter mortality from ischaemic heart disease, cerebrovascular disease, respiratory disease, and all causes in warm and cold regions of Europe. Lancet 1997; 34 (9062): 1341–1346
Willer CJ, Dyment DA, Sadovnick AD, et al. Timing of birth and risk of multiple sclerosis: population based study. BMJ 2004; 330: 120–123
Fonnebo V. Month of birth and prevalence of musculoskeletal diseases later in life. Lancet 1987; 535: 739–740
Edwards B, Waterhouse J, Atkinson G, et al. Exercise does not necessarily influence the phase of the circadian rhythm in temperature in healthy humans. J Sports Sci 2002; 20 (9): 725–732
Joiner TEJ, Pfaff JJ, Acres JG, et al. Birth month and suicidal and depressive symptoms in Australians born in the Southern vs the Northern hemisphere. Psychiatry Res 2002; 112: 89–92
Messias E, Kirkpatrick B, Bromet E, et al. Summer birth and deficit schizophrenia: a pooled analysis form six countries. Arch Gen Psychiatry 2004; 61: 985–989
Simmons C, Paull GC. Season-of-birth bias in association football. J Sports Sci 2001; 19: 677–686
Helsen W, Hodges NJ, Van Winkel J, et al. The roles of talent, physical precocity and practice in the development of soccer expertise. J Sports Sci 2000; 18: 727–736
Malina R. Youth football players: number of participants, growth and maturity status. In: Reilly T, Cabri J, Araujo D, editors. Science and football V. London: Routledge, 2005: 419–428
Richardson DJ, Stratton G. Preliminary investigation into the seasonal birth distribution of England World Cup campaign players. In: Spinks W, Reilly T, Murphy A, editors. Science and football IV. London: Routledge, 2002: 417–420
Bamsley RH, Thompson AH, Barnsley PE. Hockey success and birth date: the relative age effect. Can Assoc Health Phys Educ Recr J 1985; 51: 23–28
Ainslie PN, Reilly T. Physiology of accidental hypothermia in the mountains: a forgotten story. Br J Sports Med 2003; 37: 548–550
Reilly T, Hardiker R. Somatotype and injuries in adult student rugby football. J Sports Med Phys Fitness 1981; 21: 186–191
Mohr M, Krustrup P, Nybo L, et al. Muscle temperature and sprint performance during soccer matches: beneficial effects of re-warm-up at half-time. Scand J Med Sci Sports 2004; 14: 156–162
Honkanen R. The role of slippery weather in accidental falls. J Occup Accid 1982; 4: 257–262
Lee AJ, Garraway WM. The influence of environmental factors on rugby football injuries. J Sports Sci 2000; 18: 91–95
Hawkins RD, Hulse MA, Wilkinson C, et al. The association football medical research programme: an audit of injuries in professional football. Br J Sports Med 2001; 35: 43–47
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This article was undertaken without any external sponsorship and none of the authors had any conflict of interest when preparing the article. The authors acknowledge the help of Professor Greg Atkinson in commenting on an initial draft of the article.
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Reilly, T., Peiser, B. Seasonal Variations in Health-Related Human Physical Activity. Sports Med 36, 473–485 (2006). https://doi.org/10.2165/00007256-200636060-00002
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DOI: https://doi.org/10.2165/00007256-200636060-00002