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Original scientific paper

Creatine supplementation alters the hormonal response to resistance exercise

Rahman Rahimi ; Department of Physical Education & Sport Science, Islamic Azad University, Branch of Mahabad, Mahabad, Iran
Hassan Faraji ; Department of Physical Education & Sport Science, Azad University, Branch of Marivan, Marivan, Iran
Dariush Sheikholeslami Vatani ; Department of Physical Education & Sport Science, University of Kurdistan, Sanandaj, Iran
Mohammad Qaderi ; Department of Physical Education & Sport Science, Islamic Azad University, Branch of Mahabad, Mahabad, Iran

Fulltext: english, pdf (248 KB) pages 28-35 downloads: 33* cite
APA 6th Edition
Rahimi, R., Faraji, H., Sheikholeslami Vatani, D. & Qaderi, M. (2010). Creatine supplementation alters the hormonal response to resistance exercise. Kinesiology, 42. (1.), 28-35. Retrieved from https://hrcak.srce.hr/54239
MLA 8th Edition
Rahimi, Rahman, et al. "Creatine supplementation alters the hormonal response to resistance exercise." Kinesiology, vol. 42., no. 1., 2010, pp. 28-35. https://hrcak.srce.hr/54239. Accessed 16 Sep. 2021.
Chicago 17th Edition
Rahimi, Rahman, Hassan Faraji, Dariush Sheikholeslami Vatani and Mohammad Qaderi. "Creatine supplementation alters the hormonal response to resistance exercise." Kinesiology 42., no. 1. (2010): 28-35. https://hrcak.srce.hr/54239
Harvard
Rahimi, R., et al. (2010). 'Creatine supplementation alters the hormonal response to resistance exercise', Kinesiology, 42.(1.), pp. 28-35. Available at: https://hrcak.srce.hr/54239 (Accessed 16 September 2021)
Vancouver
Rahimi R, Faraji H, Sheikholeslami Vatani D, Qaderi M. Creatine supplementation alters the hormonal response to resistance exercise. Kinesiology [Internet]. 2010 [cited 2021 September 16];42.(1.):28-35. Available from: https://hrcak.srce.hr/54239
IEEE
R. Rahimi, H. Faraji, D. Sheikholeslami Vatani and M. Qaderi, "Creatine supplementation alters the hormonal response to resistance exercise", Kinesiology, vol.42., no. 1., pp. 28-35, 2010. [Online]. Available: https://hrcak.srce.hr/54239. [Accessed: 16 September 2021]

Abstracts
The purpose of this study was to determine the influence of short-term creatine supplementation on hormonal responses to resistance exercise. 27 trained men were randomly divided into a creatine supplementation group [the CR group (n=15), taking 4×5 g creatine monohydrate/day] or a placebo supplementation group [the PL group (n=12), taking 4×7.5 g maltodextrin/day]. A double-blind research design was employed for a 7-day supplementation period. After this period, the participants performed exercise testing. Blood tests occurred on day 1 prior to supplementation loading (1Pre) and after this period [on the exercise testing day: pre-exercise (Pre), immediately post-exercise (IP), and 15 (15P) and 30 (30P) minutes post-exercise] for the measurement of the serum growth hormone and testosterone concentrations. Significant differences in the number of repetitions and volume were seen with CR (7.2±1.3 repetitions, 1560±386 kg) compared to PL (5.6±2 repetitions, 1089±341 kg) at set 5 of the exercise protocol (p=.01). Serum growth hormone and testosterone were significantly higher at 15P in CR (6.1±1.8 ng/ml, 70.1±19 pmol/L) compared to PL (4.1±1.7 ng/ml, 44.8±16 pmol/L) [(p=.02), (p=.01)]. The enhanced exercise performance resulted in a significantly greater increase in both the growth hormone and testosterone concentrations, indicating an augmented anabolic hormone response to creatine supplementation.

Keywords
creatine loading; anabolic hormones; growth hormone; testosterone; exercise performance

Hrčak ID: 54239

URI
https://hrcak.srce.hr/54239

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