Mahtab Moazzami , Asra Askari ,
Volume 12, Issue 2 (3-2018)
Abstract
ABSTRACT
Background and objectives: The aim of this study was to investigate the effects of six months of aerobic exercise on lipid profile, inflammatory markers, and risk factors of cardiovascular disease in middle-aged obese women.
Methods: Fifteen obese woman (age range: 35 to 45 years) with BMI of ≥30 Kg/m2 were enrolled via purposeful and convenience sampling. The participants were randomly divided into training (n=10) and control (n=5) groups. Blood samples (7 ml) were taken from all participants before the first training session and after the last training session. The women performed 60 minutes of aerobic exercise at 55-65% of heart rate reserve, three sessions a week, for six months. Data was analyzed using independent and paired t-tests and Mann-Whitney U and Wilcoxon tests at significance of 0.05.
Results: After the six-month aerobic exercise, C-reactive protein, low-density lipoprotein, triglycerides, total cholesterol and high-density lipoprotein/total cholesterol decreased significantly. The exercise intervention also caused a significant increase in the concentrations of high-density lipoprotein and apolipoprotein A.
Conclusion: Aerobic exercise can reduce the level of inflammatory markers associated with risk of cardiovascular disease and atherosclerosis.
Keywords: Lipid profile, Inflammatory markers, Obese women, Apolipoprotein, Aerobic exercise.
Mehrdad Fathi , Mohammad Mosaferi Ziaaldini , Somaye Khairabadi , Keyvan Hejazi ,
Volume 12, Issue 6 (11-2018)
Abstract
ABSTRACT
Background and objectives: Studies have shown that exercise can affect hormone secretion and some metabolic and endocrine functions. The aim of this study was to assess the effect of eight weeks of aerobic training on thyroid hormones and quality of life in obese postmenopausal women.
Methods: In this semi-experimental study, 21 obese (body mass index >30 Kg/m2) women aged between 35 and 45 were randomly divided into an experimental (n=10) group and a control group (n=11). The subjects in the experimental group performed 30-60 minutes of aerobic exercise at 65-75% of maximum heart rate, three times a week, for eight weeks. Level of thyroid hormones and quality of life subscales were compared within and between the groups. Statistical analysis was performed at significance level of 0.05.
Results: After the eight-week exercise program, thyroxine, triiodothyronine and thyrotropin releasing hormone levels increased significantly, and thyroid releasing hormone level decreased significantly (P=0.001). The exercise program also had significantly positive effects on quality of life and its occupational, sexual and emotional subscales in obese postmenopausal women.
Conclusion: Aerobic exercise causes a significant increase in levels of thyroxine, triiodothyronine and thyrotropin releasing hormone and some subscales of quality of life. It also causes a significant decrease in thyroid releasing hormone level, which indicates the effect of exercise on hormone secretion.
KEYWORDS: Thyroid hormones, Obese, Quality of life, Aerobic training.
Ameneh Bahreini, Maryam Akbarpour, Rozita Fathi, Hossein Goldashti,
Volume 15, Issue 3 (5-2021)
Abstract
Background and objectives: Given the growing prevalence of obesity in children, the present study aimed to investigate effects of continuous and interval aerobic training on insulin resistance index and serum cortisol levels of obese girls.
Methods: The study was performed on 36 healthy girls aged 9-11 years with a body mass index (BMI) of higher than 85th percentile. The subjects were randomly divided into three groups of interval training, continuous training and control. The training groups performed exercises three days a week for eight weeks. The exercises were performed at 70% of VO2max in the first four weeks and at 80% of VO2max in the following weeks. Fasting blood samples were taken 72 hours before the first session and 72 hours after the last training session in order to measure levels of cortisol, glucose, insulin and Homeostatic Model Assessment for Insulin Resistance (HOMA-IR).Weight, BMI and body fat percentage were also measured by conventional methods. Data analysis was performed in SPSS 21 using paired t-test and one-way analysis of variance.
Results: The mean level of BMI and body fat percentage decreased significantly after the interval and continuous training, respectively (P<0.05). The HOMA-IR index did not change significantly in the study groups (P>0.05). The cortisol level increased slightly in the continuous training and control groups (P=0.075) and decreased insignificantly (P=0.131) in the interval training group. There was no difference between the training groups and the control group in terms of HOMA-IR and cortisol levels.
Conclusion: Insulin levels, HOMA-IR showed a decrease trend while a reasonable increase in cortisol level we showed in the continuous training group. BMI level and fat percentage decreased in two both training groups.
