Prestasjonsfrem. midler og idrett: Kreatin
Kreatintilskudd er vist å ha en viss prestasjonsfremmende effekt blant yngre menn som driver med vektløfting, men en slik effekt var fraværende hos kvinner og blant personer over 60 år25. En annen studie viste noe forbedrete resultater ved utøvelse av eksplosive øvelser av kortere enn 30 sekunders varighet, mens det ikke hadde noen fremmende effekt blant løpere og svømmere26.
Annonse
Korttidsbruk, 3-5 dager, fører til vektøkning på grunn av økt mengde kroppsvann. Langtidsbruk viste få eller ingen bivirkninger27.
Kreatin står ikke på dopinglisten.
Referanser
- Parkinson AB, Evans NA. Anabolic androgenic steroids: a survey of 500 users. Med Sci Sports Exerc 2006 Apr;38(4):644-51. PubMed
- Position of the American Dietetic Association, Dietitians of Canada, and the American College of Sports Medicine: nutrition and athletic performance. J Am Diet Assoc 2000; 100: 1543-56. PubMed
- Abel T, Knechtle B, Perret C, Eser P, von Arx P, Knecht H. Influence of chronic supplementation of arginine aspartate in endurance athletes on performance and substrate metabolism-a randomized, double-blind, placebo-controlled study. Int J Sports Med 2005; 26: 344-9. PubMed
- Colombani PC, Bitzi R, Frey-Rindova P, et al. Chronic arginine aspartate supplementation in runners reduces total plasma amino acid level at rest and during a marathon run. Eur J Nutr 1999; 38: 263-70. PubMed
- Williams AG, van den Oord M, Sharma A, Jones DA. Is glucose/amino acid supplementation after exercise an aid to strength training? Br J Sports Med 2001; 35: 109-13. British Journal of Sports Medicine
- American college of sports medicine, American dietetic association and Dietitians of Canada. Joint Position Statement. Nutrition and athletic performance. Med Sci Sports Exerc 2000; 32: 2130-45. PubMed
- Griggs RC, Kingston W, Jozefowicz RF, Herr BE, Forbes G, Halliday D. Effect of testosterone on muscle mass and muscle protein synthesis. J Appl Physiol 1989; 66: 498-503. PubMed
- Hartgens F, Kuipers H. Effects of androgenic-anabolic steroids in athletes. Sports Med 2004; 34: 513-54. PubMed
- van Marken Lichtenbelt WD, Hartgens F, Vollaard NB, Ebbing S, Kuipers H. Bodybuilders' body composition: effect of nandrolone decanoate. Med Sci Sports Exerc 2004; 36: 484-9. PubMed
- Hartgens F, Rietjens G, Keizer HA, Kuipers H, Wolffenbuttel BH. Effects of androgenic-anabolic steroids on apolipoproteins and lipoprotein (a). Br J Sports Med 2004; 38: 253-9. British Journal of Sports Medicine
- Grace F, Sculthorpe N, Baker J, Davies B. Blood pressure and rate pressure product response in males using high-dose anabolic androgenic steroids (AAS). J Sci Med Sport 2003; 6: 307-12. PubMed
- Silvester LJ. Self-perceptions of the acute and long-range effects of anabolic-androgenic steroids. J Strength Cond Res 1995; 9: 95-8. PubMed
- Boyadjiev NP, Georgieva KN, Massaldjieva RI, Gueorguiev SI. Reversible hypogonadism and azospermia as a result of anabolic-androgenic steroid use in a bodybuilder with personality disorder. A case report. J Sports Med Phys Fitness 2000; 40: 271-4. PubMed
- Nevole G. The effect of anabolic steroids on female athletes. Athletic Training 1987; 22: 297-9. PubMed
- Pärssinen M, Kujala U, Vartiainen E, Sarna S, Seppälä T. Increased premature mortality of competitive powerlifters suspected to have used anabolic agents. Int J Sports Med 2000; 21: 225-7. PubMed
- Ballantyne CS, Phillips SM, MacDonald JR, Tarnopolsky MA, MacDougall JD. The acute effects of androstenedione supplementation in healthy young males. Can J Appl Physiol 2000; 25: 68-78. PubMed
- Broeder CE, Quindry J, Brittingham K, et al. The Andro Project: physiological and hormonal influences of androstenedione supplementation in men 35 to 65 years old participating in a high-intensity resistance training program. Arch Intern Med 2000; 160: 3093-104. PubMed
- Birkeland KI, Stray-Gundersen J, Hemmersbach P, Hallen J, Haug E, Bahr R. Effect of rhEPO administration on serum levels of sTfR and cycling performance. Med Sci Sports Exerc 2000; 32: 1238-43. PubMed
- Shaskey DJ, Green GA. Sports haematology. Sports Med 2000; 29: 27-38. PubMed
- Kovacs EM, Stegen JH, Brouns F. Effect of caffeinated drinks on substrate metabolism, caffeine excretion, and performance. J Appl Physiol 1998; 85: 709-15. PubMed
- Bruce CR, Anderson ME, Fraser SF, et al. Enhancement of 2000-m rowing performance after caffeine ingestion. Med Sci Sports Exerc 2000; 32: 1958-63. PubMed
- Juhn M. Popular sports supplements and ergogenic aids. Sports Med 2003; 33: 921-39. PubMed
- Welsh RS, Davis JM, Burke JR, Williams HG. Carbohydrates and physical/mental performance during intermittent exercise to fatigue. Med Sci Sports Exerc 2002; 34: 723-31. PubMed
- Kirkendall DT. Creatine, carbs, and fluids: how important in soccer nutrition? Sports Science Exchange 2004;17.
- Dempsey RL, Mazzone MF, Meurer LN. Does oral creatine supplementation improve strength? A meta-analysis. J Fam Pract 2002; 51: 945-51. PubMed
- Branch JD. Effect of creatine supplementation on body composition and performance: a meta-analysis. Int J Sport Nutr Exerc Metab 2003; 13: 198-226. PubMed
- Groeneveld GJ, Beijer C, Veldink JH, Kalmijn S, Wokke JH, van den Berg LH. Few adverse effects of long-term creatine supplementation in a placebo-controlled trial. Int J Sports Med 2005; 26: 307-13. PubMed
- Bell DG, McLellan TM, Sabiston CM. Effect of ingesting caffeine and ephedrine on 10-km run performance. Med Sci Sports Exerc 2002; 34: 344-9. PubMed
- Bell DG, Jacobs I, Ellerington K. Effect of caffeine and ephedrine ingestion on anaerobic exercise performance. Med Sci Sports Exerc 2001; 33: 1399-403. PubMed
- Shekelle PG, Hardy ML, Morton SC, et al. Efficacy and safety of ephedra and ephedrine for weight Loss and athletic performance: a meta-analysis. JAMA 2003; 289: 1537-45. Journal of the American Medical Association
- Liu H, Bravata DM, Olkin I, et al. Systematic review: the effects of growth hormone on athletic performance. Ann Intern Med 2008; 148: 747-58. Annals of Internal Medicine
- Tsalis G, Nikolaidis MG, Mougios V. Effects of iron intake through food or supplement on iron status and performance of healthy adolescent swimmers during a training season. Int J Sports Med 2004; 25: 306-13. PubMed
- Bird SR, Wiles J, Robbins J. The effect of sodium bicarbonate ingestion on 1500-m racing time. J Sports Sci 1995; 13: 399-403. PubMed
- Bishop D, Claudius B. Effects of induced metabolic alkalosis on prolonged intermittent-sprint performance. Med Sci Sports Exerc 2005; 37: 759-67. PubMed
- Jenkinson DM, Harbert AJ. Supplements and sports. Am Fam Physician 2008; 78: 1039-46. American Family Physician