Introduction: present study aimed to investigate the effect of type of food on growth hormone concentrations in response to physical activity in children. Methods: 25 boys (aged 9-14) with complete physical health were randomly divided into three groups, including high carbohydrate (65% carbohydrate, HC), high fat (50% fat, HF), and Normal (N) diet. Physical activity included 10 cycles of 6 seconds sprint running for 20 minutes. Blood was taken in the fasting state, 45 minutes after diet, and 15 minutes after physical activity. Repeated measure ANOVA, factorial analysis of variance and Tukey's post hoc test at significant level of 0.05 were used to analyze the data. Results: After breakfast, the growth hormone decreased in HC and HF groups. In the HF group, the increase in growth hormone after activity was significant compared to the fasting state (P = 0.01) and post-breakfast state (P = 0.03). The increase after activity was significant in comparison with the post-breakfast state (P = 0.03) in the HF group. In the N group, the growth hormone increased after breakfast (P = 0.03) and activity (P = 0.04) compared to the fasting state. Conclusion: Consumption of food with carbohydrates and lipids reduces the growth hormone secretion, but does not change the response to activity. تفاصيل المقالة

Introduction: Estrogen is the basis of pregnancy and is involved in many physiological activities. Regarding the effects of exercise on lipid profile and estrogen, the aim of this study was to investigate the relationship between estrogen and lipid levels in active women. Methods: From among female students of Islamic Azad University of Masjed-Soleiman, after examining the conditions of inclusion and signing consent form, 38 inactive women (age: 26.1 ± 6.27 y; BMI: 24.2 ± 2.4 kg.m-2) and 31 active women (at least 150 min activity per week; age: 27.68 ± 5.72y, BMI: 22.3 ± 65.64 kg.m-2) participated in study. In the late folicular phase, 3-cc blood was taken from the subjects in the fasting state. HDL, LDL, TG, cholesterol and estrogen (17 Beta-estradiol) were measured during four months. Pearson correlation and sample t-test for statistical analysis was used. The significance level was p <0.05. Results: The results showed in active women there was a significant inverse relationship between estrogen and cholesterol (P = 0.01) and TG (P = 0.02). Comparing the groups, the levels of cholesterol (P = 0.0001), LDL (P = 0.0001) and TG (P = 0.01) in active woman were significantly lower than inactive women. Conclusion: The results of our study showed that measurement of estrogen and blood lipids in different times of menstrual cycle was different in active and inactive women. Therefore, regarding the enormous effects of endogenous estrogen on health, it is recommended that women maintain a good level of activity per week in order to benefit from its health benefits. تفاصيل المقالة