List of Articles Circadian Rhythm

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  1 - The Acute Effect of Concurrent Resistance and Repeated Sprint Exercise on Circadian Rhythms of Thyrotropin and Thyroxine in Active Male
  Shirin Zilaei Bouri Shahla Dehghan Ghahfarokhi Omid Rahimi BabaAhmadi Ahmad Savaedi Esmaeil Sharafi Mooliz
  10.30495/varzesh.2023.1986494.1054
  Background: Thyroid hormones are essential for normal body growth. So investigating on the acute effects of physical activity on these hormones is of utmost importance. Thus, this study was performed to evaluate the effects of resistance and sprint exercise on the thyro More

  Background: Thyroid hormones are essential for normal body growth. So investigating on the acute effects of physical activity on these hormones is of utmost importance. Thus, this study was performed to evaluate the effects of resistance and sprint exercise on the thyrotropin and thyroxine hormones in active men. Methods: Ten volunteers' active males (mean age: 26.1 years, height 176.40 cm, body weight 97.78 kg) participated in two sessions at one-week intervals in resistance (RE) and resistance-repeated sprint (RRSE) exercise programs. The exercise was performed at 4 pm by performing two squat and lift exercises for RE (7 sets of 6 repetitions with 80% maximum repetition) and 6 repetitions of 20 meters speed for RSE. At each session, eight times of blood sampling was implemented at an interval of one hour before the exercise to 20:00 and 24 to 3 at midnight. Findings: Data analysis showed that the effects of RE and PRSE in some hours on the secretion of thyrotropin showed significant differences, but not on thyroxine. The level below the 24-hour curve in comparison to the two sessions of physical activity also showed that the PRSE compared to the RE resulted in the release of more thyrotropin (P=0.0001) and thyroxine (P=0.0001).Conclusion: It seems that resistance-repeated sprint appears more metabolic needs in the body that may be a way to increase metabolism and loss weight, as well as confirms the need for an adequate recovery period after these combined activities. Manuscript profile
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  2 - Effect of Exercise at Morning in Comparison with Evening on Response of Spexin and Leptin to Eight Weeks of Endurance Training in Obese Women
  Mohammad Karimi Mozhgan Baghaei-Barzabadi
  10.22034/ascij.2023.1985540.1490
  Disturbance in regulation of energy balance in obesity involves several mechanisms, many of which are still not well understood. Circadian rhythms are followed by hormonal fluctuations, especially hormones involved in appetite. The aim of this research was to study the More

  Disturbance in regulation of energy balance in obesity involves several mechanisms, many of which are still not well understood. Circadian rhythms are followed by hormonal fluctuations, especially hormones involved in appetite. The aim of this research was to study the effect of eight weeks of endurance training in the morning compared to the evening on the levels of spexin and leptin in obese women. In this semi-experimental study, 30 obese female volunteers with an average age of 35.3 ± 4.4 years and a body mass index of 31.7 ± 1.2 kg/m2 were randomly divided into three equal groups (n = 10) including; Control, morning training and evening training groups. The protocol of endurance training was carried out for eight weeks, three sessions per week and with an intensity of 60 to 75% of the maximum heart rate. 48 hours before and after the intervention of endurance training, blood sampling was done under conditions of 10 hours of overnight fasting. Spexin and leptin values were evaluated by ELISA method. Data were analyzed by using one-way analysis of variance test at a significance level of p<0.05. The results showed that exercise intervention in the morning and evening led to a significant decrease in leptin values (p=0.02) and a significant increase in spexin values (p=0.03). In comparison between morning and evening training, changes in leptin (p=0.01) and spexin (p=0.01) were higher in the evening session. Based on the findings of this study, it seems that endurance training with moderate intensity in a period of eight-week may have positive effects on the hormones of spexin and leptin in the matter of appetite. Evening training has better effects than morning training. Manuscript profile
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  3 - Comparison of the Effect of Eight Weeks of Endurance Training at Morning and Evening on Asprosin, Leptin, Insulin Resistance and Appetite Index in Non-athlete Obese Men
  bahman Zadeh-Hendijani sedigheh Hoseinpour Delavar mohammad karimi mehran ghahramani
  10.22034/ascij.2023.1999845.1558
  Satiety-hunger signals regulate rhythmic clocks in peripheral tissues through the availability of many macronutrients in the circulation. The aim of this research was to study the effect of eight weeks of endurance training in the morning and the evening on serum levels More

  Satiety-hunger signals regulate rhythmic clocks in peripheral tissues through the availability of many macronutrients in the circulation. The aim of this research was to study the effect of eight weeks of endurance training in the morning and the evening on serum levels of asprosin, leptin, insulin, insulin resistance and appetite index in non-athlete obese men. In this semi-experimental study, 36 non-athletic obese young men with an average age of 25.4 ± 3.3 years, weight 98.3 ± 7.7 kg, and body mass index 31.8±1.2 kg/m2 were selected as subjects in a targeted and available manner. Subjects were randomly divided into three equal groups including; Control, morning training and evening training. The endurance training protocol was implemented for eight weeks, three sessions per week and with an intensity of 60 to 75% of the maximum heart rate. Before and after the training period, blood sampling was done at 10 hours of overnight fasting state. The data were analyzed using one-way analysis of variance and at a significance level of p < 0.05. Eight weeks of endurance training led to a significant decrease in asprosin (p = 0.0001), leptin (p = 0.02), insulin (p = 0.0001), glucose (p = 0.0001), insulin resistance (p = 0.0001) and appetite index (p = 0.001). Tukey’s post hoc test indicated that, compared to the control group, evening training has a greater and more significant effect on all the mentioned variables. It seems that endurance training in morning and evening can have positive effects on asprosin, leptin, insulin resistance and appetite index. However, training in the evening seems to have more positive effects on these factors. Manuscript profile