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논문 기본 정보

자료유형
학술저널
저자정보
Mohammad Fayiz AbuMoh"d (Yarmouk University) Ibtihaj Al-Junaidi (Yarmouk University)
저널정보
한국코칭능력개발원 International Journal of Coaching Science International Journal of Coaching Science Vol.14 No.1
발행연도
2020.1
수록면
39 - 51 (13page)

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초록· 키워드

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The present study was designed to investigate the acute effect of caffeine on prolactin, dopamine, thyroxine, and testosterone responses to 12 min running test. In addition, the effect of caffeine intake on achieved distance during the test was determined. Eleven male sub-elite long-distance runners (mean ± SD: age 23.17 ± 3.25 yrs; height 171.90 ± 3.43 m; body mass 65.73 ± 6.03 kg; BMI 22.20 ± 1.31; training volume 9.27 ± 3.13 h/week, VO<sub>2max</sub> 49.60 ± 5.60 ml/kg/min) performed two consecutive trials (7 days apart). Athletes were assigned randomly either to ingest 6 mg/kg of caffeine 1 h prior to exercise or placebo using a double-blind, placebo-controlled crossover design. During the test, participants were asked to run the farthest distance they could possibly achieve. Blood and urine samples were collected immediately at the end of each trial. Using paired sample t test, data showed significantly lower serum prolactin levels in the caffeine trial (20.427 ± 3.503 ng/ml) than in the placebo (22.690 ± 3.318 ng/ml) (P < 0.001), whereas dopamine was significantly elevated with caffeine than with placebo (250.181 ± 69.697 μg/g; 217.363 ± 59.287 μg/g for caffeine and placebo, respectively; P = 0.020). No differences existed between trials for testosterone (P = 0.614). The achieved distance during 12 min running was significantly more (3828.56 ± 153.47 min) with caffeine ingestion compared with the placebo (3787.81 ± 144.92 min) (P = 0.002). In conclusion, 6 mg/kg of caffeine 1 hour prior to short intense aerobic exercise (12 min running test) had positively effect on achieved distance and hormonal responses in longdistance runners probably due to increased dopaminergic pathway activity.

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Abstract
Introduction
Method
Results
Discussion
Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2020-692-000376963