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    Investigation of serum leptin levels in professional male football players and healthy sedentary males
    (MAGHIRA & MAAS PUBLICATIONS, 2005) Unal, M; Unal, DO; Baltaci, AK; Mogulkoc, R; Kayserilioglu, A
    OBJECTIVE: In the present study we aimed at investigating leptin levels in professional male athletes who have been exercising regularly for a long time and leptin levels in healthy sedentary males. METHODS: The study included 10 male professional football players and 17 healthy sedentary males. The relations between groups in terms of leptin levels, Max VO2 levels, blood lactic acid levels before and after exercise and effort durations were investigated. RESULTS: It was found in the study that although BMI of professional male athletes was higher than that of the healthy sedentary males, leptin levels of the former were significantly lower (p < 0.01), while VO(2)Max levels (p < 0.05) and test periods (p < 0.01) were significantly higher than those in the latter. As for lactic acid levels after exercise and between groups, these were also higher in athletes, but the difference was not statistically significant (p > 0.05). CONCLUSION: Leptin levels of those who exercised regularly were found lower than the levels in healthy males. Although the increase in serum leptin levels is in direct proportion with BMI in general, the major determinant of serum leptin level is the body fat rate. As regular exercising reduces body tat rate, it also reduces serum leptin levels.
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    The relation between serum leptin levels and max VO2 in male patients with type I diabetes and healthy sedentary males
    (TAYLOR & FRANCIS INC, 2004) Unal, M; Unal, DO; Salman, F; Baltaci, AK; Mogulkoc, R
    This study aimed at investigating leptin levels in male diabetes type I patients who were on insulin treatment and also healthy sedentary males. The study included 10 male type I diabetes patients and 17 healthy sedentary males. Leptin levels of type I diabetes patients and healthy sedentary males with body mass index (BMI) over 25 kg/m(2) were evaluated separately. The relation between serum leptin, max VO2, blood lactic acid levels before and after exercise, and effort durations of participants were investigated. At the end of the tests, no difference was found between leptin levels, max VO2 values, lactic acid values before exercise, and test durations of male type I diabetes patients and healthy sedentary males (p > .05), whereas lactic acid levels after exercise were found to be lower in healthy sedentary males (p < .05). Leptin levels in the group with BMI above 25 kg/m(2) were higher than those in the group with BMI below 25 kg/m(2) (P < .001). It was also seen that max VO2 values and test durations were higher in the group with BMI below 25 kg/m(2) (p < .05). In conclusion, leptin levels of male type I diabetes patients are close to those of healthy sedentary males. The increase in leptin levels in both groups is in proportion to the BMI of individuals.