Hematological profile of players from a elite team football of the Portigiese 1st league
Abstract
Despite the importance of hematological indicators in football, their comprehension and use is one of the most common limitations in the sport. Thereby, the purpose of this study was to characterize hematologically the players of an elite football team of the Portuguese 1st league over the period of 1 year. Twenty elite players from a professional football team of the 1st Portuguese League, with a mean age of 26 years (SD = 5.0) were studied. The data collected are the result of clinical evaluations and analyzes carried out in three phases. Wilcoxon tests for repeated measures and Friedman tests were performed. In the case of post-hoc analyzes of the significant variables of the Friedman test, the Bonferroni adjustment was applied. The hematocrit medians at stage 1, 2 and 3 were respectively 44%, 46.9% and 43.15%, with differences observed between phase 1 and 3 (Z = -3.101, p = 0.002) and 2 and 3 (Z = -3,547, p <.001). For the erythrocytes, the medians were 5.15x1012 / L, 5.05x1012 / L and 5.35x1012 / L, with differences between phase 2 and 3 (Z = -3,595, p <.001). In VGM, the medians were 84.00FL, 85.50FL and 87.00FL. There were differences between phase 1 and 3 (Z = -3.312, p = 0.001). Finally, the HGM presented median values of 29.00pg, 29.50pg and 29.00pg, with differences between phases 1 and 3 (Z = -2,652, p = 0.008) and phase 2 and 3 (Z = -3,466, p = 0.001). This study presents as main indicators the stabilization of hematological values from the beginning to the middle of the sporting season, and a slight improvement compared to the final measurement.
References
-AND/ACSM. Position of the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine: Nutrition and Athletic Performance. Med Sci Sports Exerc. Vol. 48. Num. 3. p. 543-568. 2016.
-Anđelković, M. e colaboradores. Hematological And Biochemical Parameters In Elite Soccer Players During A Competitive Half Season. Journal of Medical Biochemistry. Vol. 34. Num. 4. p. 460-466. 2015.
-Banfi, G.; e colaboradores. Immature reticulocyte (IRF) monitored on elite athletes during a whole season. Clin Lab Haematol. Num. 27. p. 213-214. 2005.
-Bangsbo, J.; Mohr, M.; Krustrup, P. Physical and metabolic demands of training and match-play in the elite football player. Journal of Sports Sciences. Vol. 24. Num. 7. p. 665-674. 2006.
-Beard, L. Iron biology in immune function, muscle metabolism and neuronal functioning. The Journal of Nutrition. Num. 131. p. 2S-2. 2001.
-Beard J.; Tobin, B. Iron status and exercise. American Journal of Clinical Nutrition. Vol. 72. Num. 2. p. 594S-597S. 2000.
-Bernardot, D. Nutrition for serious athletes. 2nd edition, Illinois: Human Kinetics, 2012.
-Buratti, P.; e colaboradores. Recent Advances in Iron Metabolism: Relevance for Health, Exercise, and Performance. Med Sci Sports Exerc. Vol. 47. Num. 8. p. 1596-1604. 2015.
-Cossio-Bolanos e colaboradores. hemoglobin concentration and resilience of professional soccer players residing at sea level and moderate altitude regions. Journal of Exercise Physilology. Vol. 18. Num. 1. 2015.
-Deli, C.; e colaboradores. Iron supplementation and physical performance. Current issues in sports and exercise medicine. (Ed.), InTech, 2013. Disponívelem:<http://www.intechopen.com/books/current-issues-in-sports-and-exercise-medicine/iron-supplementation-and-physical-performance>
-Dunn, L.; Rahmanto, S.; Richardson, R. Iron uptake and metabolism in the new millennium. Trends in Cell Biology. Vol. 17. Num. 2. p. 93-100. 2007.
-Escanero, F.; e colaboradores. Iron Stores in Professional Athletes Throughout theSports Season. Physiology & Behavior. Vol. 62. Num. 4. p. 811-814. 1997.
-Giulianotti, R.; Robertson, R. The globalization of football: A study in the glocalization of the 'serious life'. Br J Sociology The British Journal of Sociology. Vol. 55. Num. 4. p. 545-568. 2004.
-Gomes, S.; Ribeiro, B.; Soares, A. Caracterização nutricional de jogadores de elite de futebol de amputados. Rev Bras Med Esporte. Vol. 11. Num. 1. p. 11-16. 2005.
-Lukaski, C. Vitamin and mineral status: Effects on physicalperformance. Nutrition. Vol. 20. Num. 7-8. p. 632-644. 2004.
-Malcovati, L.; Pascutto, C.; Cazzola, M. Hematologic passport for atlhetes competing in endurance sports: a feasibility study. Haematologica. Num. 88. p. 570-581. 2003.
-Miller, B.; Pate, R.; Burgess, W. Foot Impact Force and Intravascular Hemolysis During Distance Running. Int J Sports Med. Vol. 9. Num. 1. p. 56-60. 1988.
-Mohr, M.; Krustrup, P.; Bangsbo, J. Match performance of high-standard soccer players with special reference to development of fatigue. Journal of Sports Sciences. Vol. 21. Num. 7. p. 519-528. 2003.
-Nachtigall, D.; e colaboradores. Iron Deficiency in Distance Runners A Reinvestigation Using 59Fe-Labelling and Non-Invasive Liver Iron Quantification. Int J Sports Med. Vol. 17. Num. 7. p. 473-479. 1996.
-Noda, R.; e colaboradores. Nutrient intake and blood iron status of male collegiate soccer players. Asia Pac J Clin Nutr. Vol. 18. Num. 3. p. 344-350. 2009.
-Ostojic, M.; Ahmetovic, Z. Indicators of ironstatus in elite soccer players during the sports season. International Journal of Laboratory Hematology. Vol. 31. Num. 4. p. 447-452. 2008.
-Peeling, P.; Deakin, V. Prevention, detection and treatment of iron depletion and deficiency in athletes. In Burke L, Deakin V. (Ed.), Clinical Sports Nutrition. p. 270-272. Australia: McGraw-Hill, 2015.
-Reilly, K.; e colaboradores. How well do skinfolds equations predict percent body fat in elite soccer players. Int J Sports Med. Num. 30. p. 607-613. 2009.
-Reinke, S.; e colaboradores. Absolute and functional iron deficiency in professional athletes during training and recovery. International Journal of Cardiology. Vol. 156. Num. 2. p. 186-191. 2012.
-Roberto, P.; e colaboradores. Índices de aptidão funcional em jogadores de futebol da Seleção Nacional da Jamaica. Rev Bras Med Esporte. Vol. 5. Num. 3. p. 93-98. 1999.
-Silva, A.; e colaboradores. Haematological parameters and anaerobic threshold in Brazilian soccer players troughout a training program. Int J lab Hematol. Num. 30. p. 158-166. 2008.
-Spodaryk, K. Haematological and iron-related parameters of male endurance and strenght athletes. Eur J Appl Physiol. Num. 67. p. 66-70. 1993.
-Waller, F.; Haymes, M. The effects of heat and exercise on sweat iron loss. Medicine & Science in Sports & Exercise. Vol. 28. Num. 2. p. 197-203. 1996.
-Withers, T.; e colaboradores. Relative body fat and anthropometric prediction of body density of male athletes. Eur J Appl Physiol Occup Physiol. Vol. 56. Num. 2. p. 191-200.1987.
-Weight, L.; e colaboradores. “Sports anemia”: a real or apparent phenomenon in endurance-trained athletes? Int J Sports Med. Num. 13. p. 344-347. 1992.
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