KREATİN YÜKLEMESİNİN SPORCULARIN İZOKİNETİK PERFORMANSINA ETKİSİ

Öz

Bu çalışmanın amacı ergojenik yardımcı olarak kullanılan kreatin monohidrat’ın CrH2O uzun süreli 6 hafta yüklemenin sporcu performansına izokinetik güç ölçümünde toplam iş üretimi etkisinin belirlenmesidir. Araştırmaya yaşları 20-27 arasında değişen 38 kişi katılmıştır. Araştırmaya katılan denekler aktif spor yapan sporculardan seçilmiştir. Araştırma bulgularına göre; izokinetik egzersizde kreatin grubunda tüm denekler için tüm setlerde yüklemeden sonra toplam iş üretimi arttı. Birinci ve beşinci setlerde yükleme öncesi ve sonrası değerler arasındaki fark istatistiksel olarak anlamlı bulundu. Kreatin grubunda yükleme öncesi Yönc ’nden 15. güne göre değişimde bütün setlerde istatistiksel olarak anlamlı bir fark tespit edilmiştir. Aynı şekilde yükleme öncesinden 50. güne göre değişimde ise istatistiksel olarak önemli bir fark tespit edilmemiştir. Plasebo grubu yükleme öncesi ve sonrasında her 5 sette, toplam iş üretim değerleri arasında istatistiksel olarak anlamlı bir fark bulunmadı. Plasebo grubunda yükleme öncesi Yönc ’nden 15. güne göre değişimde bütün setlerde istatistiksel olarak anlamlı bir fark tespit edilmemiştir. Aynı şekilde yükleme öncesinden 50. güne göre değişimde ise istatistiksel olarak önemli bir fark tespit edilmemiştir. Araştırmanın göze çarpan bulgularında biri, uzun süreli 50 gün kreatin yüklemenin, maksimal istemli diz ekstansiyonu sırasında kas total iş üretimi değerlerine etkisi olmamıştır fakat yükleme öncesinden 15. güne göre değişimde anlamlı gelişmeler görülmüştür. Bu da total iş üretiminde, uzun süreli yüklemeler yerine iki haftalık yüklemelerin daha olumlu sonuçlar verdiği sonucunu ortaya çıkarmıştır.

Anahtar Kelimeler

• Ergojenik destek,kreatin desteği,izokinetik performans

THE EFFECT OF CREATINE SUPPLEMENTATION ON ATHLETE İSOKİNETİC PERFORMANCE

Öz

The purpose of this study is to find the effects of Creatin Monohydrate CrH2O on athlete performance isokinetic power measured as a total workout used as an ergojenic aid in long-term 6 weeks supplementation. There are 38 participants willing to join to the study. Their ages are between 20 and 27. All of them are choosed from active athletes. From the findings of this study; all the participants’ in the creatin group have increased the total workout production in all cycles of isokinetic exercise. The difference between the values in the first and fifth cycles, both before and after loading are statistically significant. In the creatin group the difference between before loading and 15th day values are statistically significant. But the difference between before loading and 50th day values does not have statistical difference. In placebo group, before and after values in all 5 cycles, there is no statistical difference between the total workout production values. There is also no statistical difference between the before loading and 15th day values. As the same there is no statistical difference between the before loading and the 50th day values. The most important finding in this study is that, there is no affect of long term creatin loading 50 days on maximal voluntary knee extansion, as a total muscle workout values. But the change in values before loading day and 15th day are significantly improved. And so we understand that, for getting better results in total workout production, we better use two weeks period loading instead of long term loading

Anahtar Kelimeler

• Ergogenic aid,creatine supplementation,isokinetic performance

Kaynakça

1. Balsom PD, Söderlund K, Ekblom B (1994) Creatine in human with special reference to creatine supplementation, Sports Med. 18: 268-277.
2. Balsom PD, Söderlund K, Sjödin B, and Ekblom B. (1995) Skeletal muscle metabolism during short duration high-intensity exercise: influence of creatine supplementation. ACTA Physiol Scand, 154:303-310.
3. Becque MD, Lochmann JD, and Melrose DR (2000) Effects of oral creatine supplementation on muscular strength and body composition. Med and Sci Sports and Exerc, 32:654-658.
4. Bird SP (2003) Creatine supplementation and exercise performance: A brief review. J Sports Sci Med 2:123-132.
5. Burke LM, Pyne DB, and Telford RD (1996) Effect of oral creatine supplementation on single- effort sprint performance in elite swimmers. Int J Sport Nutr., 6: 222-233.
6. Carl DL (1998) Effect of oral creatine and caffeine on mucle phosphocreatine resynthesis in competitive swimmers,Submitted as partial fulfillment of the requirements for the Doctor of Philosophy degree in exercise physiology, The University of Toledo.
7. Casey A, Constantin-Teodosiu D, Howell S, Hultman E, and Greenhaff PL (1996) Creatine ingestion favorably affects performance and muscle metabolism during maximal exercise in humans. Am J Physiol., 271:31-37.
8. Cinemre A (2001) Kreatin yüklemenin badminton performansına etkisi, Yayınlanmamış doktora tezi, H.Ü. Sağlık Bilimleri Enstitüsü.

9. Cooke W, and Barnes WS (1997) The influence of recovery duration on high-intensity exercise performance after oral creatine supplementation. Can J Appl Physiol. 22:454-467.
10. Dawson B, Cutler M, Moody A, Lawrence S, Goodman C, and Randall N (1995) Effects of oral creatine loading on single and repeated maximal short sprints. Aust J Sci Med Sport., 27: 56-61.
11. Earnest CP, Snell PG, Rodriguez R, Almada AL, Mitchell TL (1995) The effect of creatine monohydrate ingestion on anaerobic power indices, muscular strength body composition. ACTA Physiol Scand 153: 207-9.
12. Febbraio MA, Flanagan TR, Snow RJ, Zhago S and Carey MF (1995) Effect of creatine supplementation on intramuscular TCr, metabolism and performance during intermittent, supramaksimal exercise in humans. Acta Physiol Scan, 155: 387-395.
13. Feldman EB (1999) Creatine: A dietary supplement and ergogenic aid. Nutrition Rewiews, 57(2).
14. Green AL, Hulyman E, McDonald IA, Sewell DA, Greenhaff PL (1996) Carbohydrate ingestion augments skeletal muscle creatine accumulation during creatine supplementation in humans, Am J Physiol, 271: E821-E826.
15. Greenhaff PL, Casey A, Short AH, Haris R, Söderlund K, and Hultman E (1993) Influence of oral creatine supplementation of muscle torque during repeated bouts of maksimal voluntary exercise in man. Clin Sci, 84:565-571.
16. Heymsfield SB, Arteaga C, McManus C, Smith J, and Moffit S (1983) Measurement of muscle mass in humans: validity of the 24 hour urinary creatine method. Am J Clinical Nutr 37:478-494.
17. Hultman E, Soderlund K, Timmons JA, Cederblad G and Greenhaff PL (1996) Muscle creatine losding in man. J Appl Physiol 81:232-237.
18. Izquierdo M, Ibanez J, Gonzalez-Badillo JJ, and Gorastiaga EM (2002) Effects of creatine suplementation on muscle power, endurance, and sprint performance. Med and Sci in Sports and Exerc, 34:332-343.
19. Kreider RB, Ferreira M, Wilson M, Grindstaff P, Plisk S, Reinardy J, Cantler E, and Almada AL (1998) Effects of creatine supplementation on body composition, strength, and sprint performance. Med and Sci in sports and Exer, 30:73-82.
20. Maughan RJ (1995) Creatine supplementation and exercise performance, Int Jour Sport Nutr, 5: 94-101.
21. McKenna MJ, Morton J, Selig SE, and Snow RJ (1999) Creatine supplementation increases muscle total creatine but not maximal intermittent exercise performance. J Appl Physiol., 87:2244- 2252.
22. Mujika I, Chatard JD, Lacoste L, Barale F, and Geyssant A (1996) Creatine supplementation does not improve sprint performance in competitive swimmers. Med Sci Sports Exerc., 28: 1435-1441.
23. Mujika I, Padilla S, Ibanez J, Izquierdo M, and Gorostiaga E (2000) Creatine supplementation and sprint performance in soccer players. Med and Sci in Sports and Exer, 32:518-525.
24. Poortman JR, Auguier H, Renaut V, Durussel A, Saugy M, and Brisson GR (1997) Effect of short term creatine supplementation on renal responses in men. Eur. J. Appl. Physiol., 76: 566-567.
25. Poortman JR, and Francaux M 81999) Long term oral creatine supplementation does not impair renal function in healty athletes. Med. Sci. Sports. Exerc. 31: 1108-1110.
26. Prevost M, Nelson A and Morrik G (1997) The effects of creatine supplementation on total work output and metabolism during high intensity intermittent exercise. R Q Exerc Sport, 68:233-240.
27. Snow RJ, McKenna MJ, Selig SE, Kemp J, Stathis CG, Zhao S (1998) Effect of creatine supplementation on sprint exercise performance and muscle metabolism. J Appl Physiol, 84:1667- 1673.
28. Spriet LL (1995) Anaerobic metabolism during high-intensity exercise, In: Exercise Metabolism, Edited by Hargrea M. Campaign: Human Kinetics, p.1-39.
29. Vandenberghe K, Gillis N, Leemputte MV, Hecke PV, Vanstapel F, and Hepsel P (1996) Caffeine counteracts the ergogenic action of muscle creatine loading. J Appl Physiol, 80:452-457.
30. Volek JS, Kraemer WJ, Bush JA, Boetes M, Incledon T, Clark KL, and Lynch JM (1997) Creatine supplementation enhances muscular performance during high-intensity resistance exercise. J Am Diet Assoc., 97: 765-770.
31. Volek JS, Duncan ND, Mazzetti SA, Putukian M, Staron R, Putikian M, Gomez AL, Pearson DR, Fink WJ, and Kraemer WJ (1999) Performance and muscle fiber adaptations to creatine supplementation and heavy resistance training. Med Sci Sports Exerc, 31:1147-1156.
32. Volek JS, Ratamess NA, Rubin MR, Gomez L, French DN, McGuigan MM, Scheett TP, Sharman MJ, Kakkinen K, and Kraemer WJ (2003) The effects of creatine supplementation on muscular performance and body composition responses to short-term resistance training overreaching. Eur J Appl Physiol, 421:1003 -1031