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"Sport Medicine Journal" No.33 - 2013
ARTICLE – abstract

The effect of vitamin A and E supplements on the plasma melatonin levels of smoking sportspeople

Demirici Nevzat
Kafkas University Faculty of Education Department of Special Education, Kars, Turkey


The aim of this study is to determine the effect of smoking on the melatonin levels in sportspeople and the regulatory role of vitamin A and E supplements on this effect. 14 voluntary people who do sports actively participated in the study.
Methods, sportspeople were separated into two groups: sportspeople who had been smoking at least 10 cigarettes a day for the last year and non-smoking sportspeople. Two groups were given a two-hour exercise program which would be implemented three times a week for two weeks. An hour before the exercises, 200 mg of oral vitamin A and E supplements were given. Melatonin level measurements were done before, right after and two hours after the exercises, and measurements of serum vitamin A and E levels were done at the beginning and end of the exercise program. Inter-group variables and independent variables were compared via t test, and intra-group variables were compared via paired t test. Results.The melatonin and vitamin A and E levels of the smoking sportspeople prior to the exercises were found to be less than non-smoking sportspeople; however, no statistically significant difference was observed between these levels (p>0.05). Nevertheless, melatonin levels which increased right after the exercises were found to decrease to the pre-exercise levels two hours later. Moreover, post-exercise melatonin levels of the smoking sportspeople were determined to significantly increase compared to the non-smoking sportspeople, especially after the second week, not the first week (p<0.01). Inter-group comparison after the exercise program and the comparison of the first and final vitamin A and E levels were observed to be significantly different (p<0,05; p<0.01). As a result, While smoking was determined to have a decreasing effect on the melatonin and vitamin A and E levels, the antioxidant agent supplements such as vitamin A and E were found to be protective regarding the oxidative effects of smoking and to increase the melatonin levels in sportspeople.
Key words:

smoking, exercise, melatonin, vitamin A and E. 

Full article:

The effect of vitamin A and E supplements on the plasma melatonin levels of smoking sportspeople

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