NUTRITIONAL STRATEGIES OF SLOVENIAN NATIONAL JUNIOR SWIMMING TEAM
DOI:
https://doi.org/10.35469/ak.2018.158Abstract
Purpose: The purpose of our study was to assess the nutritional strategies of Slovenian national junior swimming team and compare them with recommendations of clinical sports nutrition. Competitive young swimmers namely have increased energy and nutrient needs compared to general adolescents due to frequent and intense training. Despite some physiological differences from adults, adult sports nutrition recommendations for macronutrients apply to them. Further, literature reports iron, calcium, and vitamin D intake as frequently inadequate.
Methods: Nutritional strategies of 19 members of Slovenian national junior swimming team were assessed retrospectively through 3-day food and activity diaries, questionnaires, anthropometric data including bioimpedance analysis. Energy availability (EA), macronutrient intake and timing, iron, calcium and vitamin D intakes, hydration, consumption of sports food and dietary supplement use were evaluated.
Results: EA in some of male swimmers and in majority of female swimmers was lower than recommended. Carbohydrate intake was adequate in male swimmers and two thirds of female swimmers. Although average protein intake exceeded the upper recommended limit, some female swimmers did not meet the lower recommended intake limit. Total fat intake was lower than recommended, with saturated fat intake on the upper recommended level. Calcium and iron intake in male swimmers exceeded recommended values, while female swimmers had lower calcium intake than recommended and some had lower iron intake, too. Vitamin D intake was low in all swimmers. Meal timing was adequate in majority of swimmers, who often reached for dietary supplements, mostly omega 3 fatty acids, multivitamins, and magnesium.
Conclusions: Low EA in young competitive swimmers is of concern. More successful, personalised nutrition strategies for young competitive swimmers, focusing on higher energy intake and healthy food choices, would contribute to the preservation of their health and development into top performers.
References
Adams, J. D., Kavouras, S. A., Robillard, J. I., Bardis, C. N., Johnson, E. C., Ganio, M. S., … White, M. A. (2016). Fluid balance of adolescent swimmers during training. Journal of Strength and Conditioning Research, 30(3), 621-625. doi: 10.1519/JSC.0000000000001132
Aerenhouts, D., Deriemaeker, P., Hebbelinck, M., & Clarys, P. (2011). Energy and macronutrient intake in adolescent sprint athletes: A follow-up study, Journal of Sports Sciences, 29(1), 73-82, doi: 10.1080/02640414.2010.521946
Aerenhouts, D., Van Cauwenberg, J., Poortmans, J. R., Hauspie, R., & Clarys, P. (2013). Influence of growth rate on nitrogen balance in adolescent sprint athletes. International journal of sport nutrition and exercise metabolism, 23(4), 409–417. doi: 10.1123/ijsnem.23.4.409
Black, A. E., Prentice, A. M., Goldberg, G. R., Jebb, S. A., Bingham S. A., Livingstone, M. B., & Coward, W. A. (1993). Measurements of total energy expenditure provide insights into the validity of dietary measurements of energy intake. Journal of American Dietetic Association, 93(5), 572 – 579. doi: 10.1016/0002-8223(93)91820-G
Boisseau, N., Vermorel, M., & Rance, M. (2007). Protein requirements in male adolescent soccer players. European Journal of Applied Physiology, 100(1), 27–33. doi: 10.1007/s00421-007-0400-4
Burke, L. (2001). Energy needs of athletes. Canadian Journal of Applied Physiology, 26(S 1), 202–219. doi: 10.1139/h2001-055
Burke, L. M., Hawley, J. A., Wong, S. H., & Jeukendrup, A. E. (2011). Carbohydrates for training and competition. Journal of Sports Sciences. 29(S1), 17-27. doi: 10.1080/02640414.2011.585473
Campbell, B., Kreider, R. B., Zigenfuss, T., La Bounty, P., Roberts, M., Burke, L., … Antonio, H. (2007). International Society of Sports Nutrition position stand: protein and exercise. Journal of International Society of Sports Nutrition, 4(8), 1-7. doi: 10.1186/1550-2783-4-8
Croll, J. K., Neumark-Sztiner, D., Story, M., Wall, M., Perry, C., & Harnack, L. (2006). Adolescents involved in weight-related and power team sports have better eating patterns and nutrient intakes than non-sport-involved adolescents. Journal of American Dietetic Association, 106(5), 709-717. doi: 10.1016/j.jada.2006.02.010
Desbrow, B., & Leveritt, M. (2015). Nutritional issues for young atlethes: children and adolescents. In: Burke, L. in Deakin, V., (Eds.), Clinical Sports Nutrition. Sidney, Australia: MCGraw Hill.
Desbrow, B., McCormack, J., Burke, L. M., Cox, G. R., Fallon, K., Hislop, M., … Leveritt, M. (2014). Sports Dietitians Australia position statement: sports nutrition for the adolescent athlete. International Journal of Sport Nutrition and Exercise Metabolism, 24(5), 570-584. doi: 10.1123/ijsnem.2014-0031
De Souza, M. J., Nattiv, A., Joy, E., Misra, M., Williams, N. I., Mallinson, R. J., … Matheson, G. (2014). Female Athlete Triad Coalition consensus statement on treatment and return to play of the female athletetriad: 1st International Conference held in San Francisco, California, May 2012 and 2nd International Conference held in Indianapolis, Indiana, May 2013. British Journal of Sports Medicine, 48(4), 289. doi: 10.1136/bjsports-2013-093218
Fayet, F., Ridges, L. A., Wright, J. K., & Petocz, P. (2013). Australian children who drink milk (plain or flavored) have higher milk and micronutrient intakes but similar body mass index to those who do not drink milk. Nutrition Research, 33(2), 95-102. doi: 10.1016/j.nutres.2012.12.005
Federation Internnationale de Natation. (2018) Fina 50m-pool world junior records (as of December 3, 2018). (Dec 8th, 2018) Retrieved from http://www.fina.org/sites/default/files/wr_jr_dec_3_2018.pdf
German nutrition society (DGE), 2004. Reference values for nutrient intake 1st edition, Ljubljana: Ministry of health, Republic of Slovenia.
Gibson, J., Stuart-Hill, L., Martin, S., & Gaul, C. (2011). Nutrition status of junior elite Canadian female soccer athletes. International Journal of Sport Nutrition and Exercise Metabolism, 21(6), 507-514. doi: 10.1123/ijsnem.21.6.507
Geiker, N. R. W., Larsen, R., Hansen, M., Jørgensen, N. R., Jakobsen, J., Hansen, B. S., … Bügel, S. (2017). Vitamin D status and muscle function among adolescent and young swimmers. International Journal of Sport Nutrition and Exercise Metabolism, 27(5), 399-407. doi: 10.1123/ijsnem.2016-0248
Golob, T., Stibilj., V., Žlender, B., Kropf, U., Korošec, M., Polak, T., … Čandek Potokar, M. (2006), “Slovenian Food Composition Tables – Meat and Meat Products,” University of Ljubljana, Biotechnical Faculty.
Gomez-Bruton, A., Montero-Marín, J., González-Agüero, A., Gómez-Cabello, A., García-Campayo, J., Moreno, L. A., … Vicente-Rodríguez, G. (2017). Swimming and peak bone mineral density: a systematic review and meta-analysis, Journal of Sports Sciences, 36(4), 365-377. doi: 10.1080/02640414.2017.1307440
Heanley, S., O’Connor, H., Giifford, J., & Naughton, G. (2010). Comparison of strategies for assessing nutritional adequacy in elite female athletes’ dietary intake. International Journal of Sport Nutrition and Exercise Metabolism, 20(3), 245–256. doi: 10.1123/ijsnem.20.3.245
Holick, M. F. (2008) Sunlight, UV-radiation, vitamin D and skin cancer: how much sunlight do we need?. In: Reichrath J. (eds) Sunlight, Vitamin D and Skin Cancer. (Advances in Experimental Medicine and Biology, Vol. 624, pp. 1-15). doi: 10.1007/978-0-387-77574-6_1
International Olympic Committee. (2011). IOC consensus statement on sports nutrition 2010. Journal of Sports Sciences, 29(S1), S3–S4. doi:10.1080/02640414.2011.619349
Jeukendrup, A. & Cronin, L. (2011). The elite young athlete. (Medicine and Sport Science, Vol. 56, pp. 47–58). doi: 10.1159/000320630
Juzwiak, C. R., Amancio, O. M. S., Vitalle, M. S. S., Pinheiro, M. M., & Szejnfeld, V. L. (2008). Body composition and nutritional profile of male adolescent tennis players. Journal of Sports Sciences, 26(11), 1209–1217. doi: 10.1080/02640410801930192
Koehler, K., Braun, H., Achtzehn, S., Hildebrand, U., Predel, H-G., Mester, J., & Schänzer, W. (2012). Iron status in elite young athletes: gender-dependent influences of diet and exercise. European journal of applied physiology, 112(2), 513-523. doi: 10.1007/s00421-011-2002-4
Koundourakis, N., Avgoustinaki, P. D., Malliaraki, N., & Margioris, A. N. (2016). Muscular effects of vitamin D in young athletes and non-athletes and in the elderly. Hormones. 15(4), 471-488. doi: 10.14310/horm.2002.1705
Kyle, U., Boseaus, I., De Lorenzo, A., Deurenberg, P., Elia, M., Gomez, M., … Pichard, C. (2004). ESPEN Guidelines. Bioelectrical impedance analysis – part 2: review of principles and methods. Clinical Nutrition, 23(6), 1430-1453. doi: 10.1016/j.clnu.2004.09.012
Loucks, A., Kiens, B., & Wright, H. (2011). Energy availability in athletes. Journal of Sports Sciences, 29(S1), S7-S15, doi: 10.1080/02640414.2011.588958
Martinez, S., Pasquarelli, B. N., Romaguera, D., Arasa, C., Tauler, P., & Aguilo, A. (2011). Anthropometric characteristics and nutritional profile of young amateur swimmers. Journal of Strength and Conditioning Research, 25(4), 1126–1133. doi: 10.1519/JSC.0b013e3181d4d3df
McDowall, J. A. (2007). Supplement use by young athletes. Journal of Sports, Science, and Medicine, 6(3), 337–342.
Meyer, F., Volterman, K. A., Timmons, B. W., & Boguslaw, W. (2012). Fluid balance and dehydration in the young athlete: Assessment considerations and effects on health and performance. American Journal of Lifestyle Medicine, 6(6), 489–501. doi: 10.1177/1559827612444525
Montenero, A., Lopez-Varela, S., Nova, E., & Marcos, A. (2002). The implication of the binomial nutrition-immunity on sportswomen's health. European Journal of Clinical Nutrition, 56, 38–41. doi: 10.1038/sj.ejcn.1601483
Mountjoy, M., Sundgot-Borgen, J., Burke, L., Carter, S., Constantini, N., Lebrun, C., … Ljungqvist, A. (2014). The IOC consensus statement: beyond the Female Athlete Triad—Relative Energy Deficiency in Sport (RED-S). British Journal of Sports Medicine, 48(7), 491-497. doi: 10.1136/bjsports-2014-093502
National institut for public health. (2016). Referenčne vrednosti za energijski vnos ter vnos hranil [Reference values for nutrient intake]. Retrieved from http://www.mz.gov.si/fileadmin/mz.gov.si/pageuploads/javno_zdravje_2015/foto_DJZ/prehrana/2016_referencne_vrednosti_za_energijski_vnos_ter_vnos_hranil_17022016.pdf
O’Dea, J. A., (2003). Consumption of nutritional supplements among adolescents: usage and perceived benefits. Health and Education Research, 18(1), 98–107. doi: 10.1093/her/18.1.98
Peeling, P., Dawson, B., Goodman, C., Landers, G., Wiegerinck, E. T., Swinkels, D. W., & Trinder, D. (2009). Cumulative effects of consecutive running sessions on hemolysis, inflammation and hepcidin activity. European Journal of Applied Physiology, 106(1), 51–59. doi: 10.1007/s00421-009-0988-7
Petrie, H. J., Stover, E. A. & Horswill, C. A. (2004). Nutritional concerns for the child and adolescent competitor. Nutrition, 20(7-8), 620-631. doi: 10.1016/j.nut.2004.04.002
Sawka, M., Burke, L., Eichner, E., Maughan, R., Montain, S., & Stachenfeld, N. (2007). American College of Sports Medicine position stand. Exercise and fluid replacement. Medicine and Science in Sports and Exercise, 39(2), 377-390. doi: 10.1249/mss.0b013e31802ca597
Sawyer, S. M., Afifi, R. A., Bearinger, L. H., Blakemore, S. J., Dick, B., Ezeh, A. C., & Patton, G. C. (2012). Adolescence: a foundation for future health. The Lancet, 379(9826), 1630-1640. doi: 10.1016/S0140-6736(12)60072-5
Shibasaki, M., Inoue, Y., Kondo, N., & Iwata, A. (1997). Thermoregulatory responses of prepubertal boys and young men during moderate exercise. European Journal of Applied Physiology and Occupational Physiology, 75(3), 212-218. doi: 10.1007/s004210050150
Smith, J. W., Holmes, M. E., & McAllister, M. J. (2015). Nutritional considerations for performance in young athletes. Journal of sports medicine, 2015(734649), 1-13. doi: 10.1155/2015/734649
Souci, S. W., Fachmann W., & Kraut, H. (2008). Food composition and nutrition tables, 7th ed. Stuttgart, Germany: MedPharm Scientific Publishers.
Thomas, D. T., Erdman, K. A., & Burke, L. M. (2016). Position of the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine: Nutrition and athletic performance. Journal of the Academy of Nutrition and Dietetics. 116(3), 501-528. doi: 10.1016/j.jand.2015.12.006
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