Muscle strength and muscle endurance: with and without creatine supplementation

Öz

Creatine is one of the legal ergogenic aids which are used by athletes here and there. A number of studies assured that it has a positive effect in high intensity short duration intensity exercise performances. This study tried to evaluate the effect of creatine monohydrate supplements on muscle strength and muscle endurance. Twenty subjects (CG= 10 and EG= 10) were participated in three months of exercise training. In this study complete randomized design was used. The EG consumed creatine and the placebo (CG) used water 45 minutes before exercise. The results indicated that Muscle endurance was improved better in the EG. In curl up performance, the CG showed 35% change while the EG improved by 87%. In addition, 44% improvement in CG and 91% improvement in EG were recorded for push up performance. However, muscle strength was highly enhanced in the EG. In one repetition maximum test, the CG and EG shown 18% and 41% change, respectively. Bench press performance of the CG and EG were improved by 11% and 39%, respectively. Barbell squat performance was improved by 22% for the CG and 51% for the EG. Hence, supplementation of creatine is useful to improve both muscular strength and muscular endurance.

Anahtar Kelimeler

• Creatine supplements; muscle endurance; muscle fitness; muscle strength.

Kaynakça

1. ArmentanoMJ, Brenner AK, Hedman TL, Solomon ZT, Chavez J, Kemper GB, Salzberg D, Battafarano DF, and Christie DS. The effect and safety of short-term creatine supplementation on performance of push-ups. Mil Med, 2007; 172(3): 312-7.
2. BirdSP. Creatine supplementation and Exercise Performance. J Sports Sc. and Med, 2003; 2:123-132.
3. Eijnde BO, Leemputte MV, Goris M, Labarque V, Taes Y, Verbessem P, Vanhees L, Ramaekers M, Eynde BV, Schuylenbergh RV, Dom R, Richter EA, and Hespel P. Effects of creatine supplementation and exercise training on fitness in men 55− 75 year old. J appl physiol, 2003; 95: 818-828.
4. FukudaDH, Smith AE, Kendall KL, Dwyer TR, Kerksick CM, Beck TW, Cramer JT, and Stout JR.The effects of creatine loading and gender on anaerobic running capacity. J Strength Cond Res,2010; 24(7): 1826-1833.
5. Kreider RB, Farris F, Kreider R, Greenwood L, and Byars A. Creatine supplementation patterns and perceived effects in select division I collegiate athletes. Clin. J. Sport Med. 1997; 10: 191-194.
6. Kreider RB, Kathleen M, Makani DS, Julie WD, Hootan K, Thomas S, Jane AK, and Morris S. Creatine Fails to Augment the Benefits fromResistance Training in Patients with HIV Infection: A Randomized, Double-Blind, Placebo-Controlled Study. J Int Soc Sports Nutr. 1998; 4: 2.
7. LemonPW. Dietary creatine supplementation and exercise performance: why inconsistent results. Can. J. Appl. Physiol, 2002; 27: 663-681.
8. Lim JY. Effectsof Creatine SupplementationonBody Composition, Strength, and Power of Female Volleyball Players. J Int Soc Sports Nutr, 2000; 6: 1543-9518.

9. Rahmani F, Nader R, Yaser G. TheComparative Effectsof Oral Creatine Supplementation and High Protein on Muscular Strength and Body Composition. Int J Sport Sc and Eng, 2008; 02(04): 223-230.
10. Rawson ES, and Volek JS. The effects of creatine supplementation and resistance training on muscle strengthand weight-lifting performance. J Strength Cond Res, 2003; 17: 822-831.
11. Tarnopolsky MA, and MacLennan DP. Creatine monohydrate supplementation enhances high-intensity exercise performance in males and females. Int J Sport Nutr Exerc Metab, 2000; 10(4): 452-63.
12. Volek JS, Ratamess NA, Rubin MR, Gómez AL, French DN, McGuigan MM, Scheett TP, Sharman MJ, Häkkinen K, Kraemer WJ. The effects of creatine supplementation on muscular performance and body composition responses to short-term resistance training overreaching. European Journal of Applied Physiology, 2004; 91: 628.
13. Zuniga JM, Housh TJ, Camic CL, Hendrix CR, Mielke M, Johnson GO, Housh DJ, Schmidt RJ. The effects of creatine monohydrate loading on anaerobic performance and one- repetition maximum strength. J. Strength Cond. Res, 2012; 26: 1651-1656.