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An Analysis of Change on Alpine Skiers’ Body Composition, Anaerobic Power, and Isokinetic Muscular Function between before and after Winter Season
Korean J Sports Med 2018;36:149-157
Published online September 1, 2018;  https://doi.org/10.5763/kjsm.2018.36.3.149
© 2018 The Korean Society of Sports Medicine.

Hye Jung Choi1, Seok Hee Kim2

1Department of Counseling, Health and Kinesiology, Texas A&M University-San Antonio, San Antonio, TX, USA, 2School of Humanities and Social Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Korea
Correspondence to: Seok Hee Kim
School of Humanities and Social Sciences, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseonggu, Daejeon 34141, Korea
Tel: +82-42-350-4821, Fax: +82-42-350-4839 E-mail: ksma@kaist.ac.kr
Received July 12, 2018; Revised August 13, 2018; Accepted August 17, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
Purpose: The purpose of this study was to investigate the changes on alpine skiers’ body composition, anaerobic power, isokinetic knee strength and muscle balance ratio (hamstring to quadriceps [HQ] ratio) before and after winter season.
Methods: The subjects of this study was 22 elite alpine skier, aged 16−20 years. Participants were divided into two groups (male, 12; female, 10). The study conducts a periodization training program in the winter season for 4 months. The data processing of this study was analyzed by paired t-test, using SPSS 21.0 statistics program.
Results: There was significance on fat free mass in male group (p<0.05); there was significance on anaerobic power and average power in female group (p<0.01), and fatigue index significantly increased in male group (p<0.05). There was significance on extension power of male group and flexion power of female group in 30°/sec. There was significance on extension power of both groups in 180°/sec (p<0.05). There was significant increase on flexion power of male group in 240°/sec (p<0.01). There was significant increase on H/Q% of female right side in 30°/sec (p<0.01). There was significance on right side of both groups in 180°/sec (p<0.05). There were significances on right and left side of both groups in 240°/sec (male, p<0.01; female, p<0.05).
Conclusion: Therefore, this study suggests that the periodization training should be important to maintain and to develop seasonal condition of alpine skiers.
Keywords : Alpine ski, Anaerobic power, Isokinetic strength, Muscle balance ratio, Periodization training
References
  1. Sharkey BJ, Gaskill SE. Sport physiology for coaches. Champaign: Human Kinetics; 2007.
  2. Ski-lifts Website. European ski season date: 2017/2018 (2017) [Internet]. Manchester (UK): Ski-lifts [cited 2018 Aug 17]. Available from http://ski-lifts.com.
  3. Heo I, Lee S. The impact of climate changes on ski industry in central region of Korea: the case of Yongpyong, Yangji, Jisan ski resort. J Korean Geogr Soc 2010;45:444-60.
  4. International Ski Federation. Proceedings of 49th International Ski Congress; 2014 June; Barcelona.
  5. Andersen RE, Montgomery DL. Physiology of alpine skiing. Sports Med 1988;6:210-21.
    CrossRef
  6. Bacharach DW, von Duvillard SP. Intermediate and longterm anaerobic performance of elite alpine skiers. Med SciSports Exerc 1995;27:305-9.
    Pubmed CrossRef
  7. White AT, Johnson SC. Physiological aspects and injury in elite alpine skiers. Sports Med 1993;15:170-8.
    CrossRef
  8. Song SI, Kin YS, Jung IS, Choi HJ, Lee HJ, Park H. The correlation between competition record and physical fitness variables in alpine skiers. Korean J Sport Sci 2005;16:12-20.
  9. Garrett WE Jr, Kirkendall DT. Exercise and sport science. Philadelphia: Lippincott Williams & Wilkins; 2000.
  10. Page P, Ellenbecker TS. The scientific and clinical application of elastic resistance. Champaign: Human Kinetics; 2003.
  11. Kang YS, Kim JS. The evaluation study of leg strength imbalance ratios measured using isokinetic dynamometer. Korea J Sports Sci 2011;20:1575-83.
  12. Eun SP. Prevention of alpine ski injuries. J Korean Orthop Sports Med 2002;1:109-14.
  13. Lee SC, Kim CH. An analysis on occurrence and cause of skier's injury in 2004/2008 season. Korea J Sports Sci 2009;18:397-406.
  14. Dvir Z. Isokinetics: muscle testing, interpretation and clinical applications. London: Churchill Livingstone; 1995.
  15. Anderson RE, Montgomery DL. Physiological monitoring of divisional ski racers during the 1986-87 season. Can J Sport Sci 1987;12:3.
  16. Park YC. A study on isokinetic thigh muscular fitness and balance of national caliber skiers [dissertation]. Seoul: Dankook University; 2000.
  17. Lee KH. Comparative analysis of isokinetic knee joint muscular functions, aerobic power and anaerobic power according to performance level of alpine skiers [dissertation]. Seoul: Dankook University; 2001.
  18. Kim JH. The effect of winter training program on balance strategy and motor control in ski player. Korea J Sports Sci 2012;21:971-83.
  19. Jeon YK, Lee KH, Kim JH, Lee SB. Comparative analysis of the isokinetic muscular function of knee joint of female national alpine skiers before and after season. Korea J Sports Sci 2012;21:993-1003.
  20. Heo SE. Comparative study of uniform nature lumbar joint and a knee joint muscular function between national alpine ski team and national reserve team [dissertation]. Seoul: Kyung Hee University; 2001.
  21. Jin YS, Park JY, Kim TW, et al. The validity of anaerobic capacity and fatigue index of wingate test. Korean J Sports Med 1998;16:97-10.
  22. Gleim GW, Nicholas JA, Webb JN. Isokinetic evaluation following leg injuries. Phys Sportsmed 1978;6:75-82.
    Pubmed CrossRef
  23. Gross MA, Breil FA, Lehmann AD, Hoppeler H, Vogt M. Seasonal variation of VO2 max and the VO2-work rate relationship in elite alpine skiers. Med Sci Sports Exerc 2009;41:2084-9.
    Pubmed CrossRef
  24. Gilgien M, Sporri J, Limpach P, Geiger A, Muller E. The effect of different global navigation satellite system methods on positioning accuracy in elite alpine skiing. Sensors (Basel) 2014;14:18433-53.
    Pubmed KoreaMed CrossRef
  25. Gorski T, Rosser T, Hoppeler H, Vogt M. An anthropometric and physical profile of young Swiss alpine skiers between 2004 and 2011. Int J Sports Physiol Perform 2014;9:108-16.
    Pubmed CrossRef
  26. Han DY, Kim JH. Aerobic power and anaerobic power fitness characteristics to details event for performance of elite skiers. J Sport Leis Stud 2010;42:849-56.
  27. Kim JH, Lee KH, Son LS, Kim CK, Kim YA, Han DY. Characteristics of isokinetic knee joint muscular functions, aerobic power and anaerobic power according to performance level of alpine skiers. Korean J Phys Educ 2003;42:721-31.
  28. Neumayr G, Hoertnagl H, Pfister R, Koller A, Eibl G, Raas E. Physical and physiological factors associated with success in professional alpine skiing. Int J Sports Med 2003;24:571-5.
    Pubmed CrossRef
  29. Perrin DH. Isokinetic exercise and assessment. Champaign:Human Kinetics; 1993.
  30. Bompa TO, Carrera MC. Periodization training for sports. Champaign: Human Kinetics; 2005.