Showing 8 results for Obesity
F Amirkhizi, F Siassi, Sm Ahmadi, M Jalali, S Institute, A Rahimi,
Volume 2, Issue 1 (4-2008)
Abstract
Abstract Background and Objectives: Women of reproductive age are at risk of Iron deficiency. Some Studies reported That There is a relationship between Body indices and iron. Iron overload is also harmful. It enhances the risk of cardiovascular disease which is due to increased Lipid peroxidation. The aim of this study was to investigate the relationship between obesity and iron status in women of reproductive age. Material and Methods: In this case-control study, the relationship between iron status and obesity in women of reproductive age was studied in 35 obese (BMIِ≥30kg/m²) and 35 non-obese (BMI=19-25kg/m²) women matched by age. Demographic data was gathered by a questionnaire. Body weight and height were measured and body mass index (BMI) was calculated for each subject. After taking Venous blood samples and separating plasma, we investigated iron status by measuring hemoglobin, hematocrit, and plasma iron and ferritin concentrations. Results: Although no difference is observed in plasma iron and Total Iron Binding Capacity (TIBC), the results of obese group show significant higher hemoglobin (137 ± 8 versus 129 ± 7 g/L, p<0.05), hematocrit (0.41 ± 0.02 versus 0.38 ± 0.03, p<0.05), and plasma ferritin concentrations (49.3 ± 32.2 versus 28.6 ± 19.7µg/L, p<0.001). In addition, BMI was positively correlated with hemoglobin (rho=0.29, p<0.001), hematocrit (rho=0.28, p<0.001), and plasma ferritin concentrations (rho=0.39, p<0.0001). Conclusion: we conclude that obese women of reproductive age have higher iron stores than the non-obese women. Therefore, obese- reproductive women are at low risk of depleting iron stores. On the other hand, systematic iron-fortification programs may enhance the prevalence of iron overload in these subjects. Keywords: Obesity, iron status, reproductive age women
Mohammad Hassan Khadem Ansari , Khadije Meghrazi ,
Volume 11, Issue 4 (7-2017)
Abstract
ABSTRACT
Obesity is a health problem defined as abnormal or excessive fat accumulation in adipose tissue. Adipokines such as adiponectin, visfatin and resistin are bioactive polypeptides with pro- and anti-inflammatory properties that are secreted by the adipose tissue that are involved in the pathogenesis and prognosis of diseases such as type 2 diabetes, metabolic syndrome and cancer. This survey aimed to review the role of these hormones in the pathogenesis and prognosis of breast cancer in obese postmenopausal women. In obese individuals, increased level of leptin leads to tumorigenesis and progression of breast cancer though JAK/STAT3 pathway. These individuals have decreased level of adiponectin, which has a protective effect against carcinogenesis via AMPK pathway. Obese individuals also have increased level of visfatin, which induces the secretion of proinflammatory cytokines such as TNFα and triggers growth of cancer cells. Similarly, elevated resistin levels increases cell proliferation through PI3K and MAPK pathways. Obesity is associated with the dysregulated secretion of adipokines such as leptin, adiponectin, visfatin and resistin, which could be utilized for early diagnosis of breast cancer.
Keywords: Obesity, Breast Cancer, Adiponectin, Leptin, Visfatin, Resistin.
Seyed Javad Mirghani, Mohammad Ali Azarbayjani , Maghsoud Peeri,
Volume 12, Issue 6 (11-2018)
Abstract
ABSTRACT
Background and Objectives: Obesity is a global health problem that could lead to cardiovascular disease, diabetes and cancer. Polygenic obesity is caused by multiple factors, such as lack of exercise and excess food intake. In this study, we evaluated effects of 12 weeks of high-intensity interval training (HIIT) and isocratic moderate-intensity training (MIT) on anthropometric indices and insulin resistance in rats fed with a high-fat diet (HFD).
Methods: Twenty-five male Wistar rats (mean age of 5-6 weeks) were divided into three groups: control group (HFD, N=5), HFD+ MIT (N=10) and HFD+ HIIT (N = 10). After placing the subjects on a HFD for 13 weeks, the exercise groups performed trainings for 12 weeks.
Results: Body mass index and Lee index decreased significantly in both training groups (P≤0.05). There was no significant difference in insulin resistance between the three groups (P>0.05).
Conclusion: Based on the results, it can be concluded that HIIT is more effective than MIT in reducing some of the obesity markers in obese rats fed with a HFD. However, this type of training has no significant impact on insulin resistance.
Keywords: Obesity, High Intensity Interval Training, High-Fat Diet, Body composition Indexes.
Mohammad Hossein Akha, Seyed Abdollah Hashemvarzi,
Volume 15, Issue 3 (5-2021)
Abstract
Background and objectives: The aim of this study was to compare the effect of an eight-weeks endurance and strength training on levels of cellular and vascular adhesion molecules in obese men.
Methods: Twenty-four obese volunteer men as subjects in this study were selected from Tehran and randomly assigned to control, endurance training, and strength training groups. The enduranBackground and objectives: Obesity, particularly abdominal obesity, is the most common cause of metabolic abnormalities, such as metabolic syndrome. The aim of this study was to compare effects of eight weeks of endurance and strength trainings on serum levels of cellular and vascular adhesion molecules in obese men.
Methods: Twenty-four obese men were randomly assigned to control, endurance training and strength training groups. The endurance training group performed a modified treadmill running protocol with an intensity of 50-70% of maximum heart rate. The resistance training included chest press, armpit stretch and leg and crus presses at intensity of 50-80% of one-repetition maximum. Serum levels of intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion protein 1 (VCAM--1) were measured using commercial ELISA kits. Data were analyzed by one-way ANOVA and post hoc Tukey test at significance of 0.05.
Results: Serum VCAM-1 and ICAM-1 levels decreased significantly in both training groups compared to the control group (P=0.0001). The reduction of serum VCAM-1 and ICAM-1 levels was more significant in the endurance training group than in the resistance training group.
Conclusion: Given the favorable effects of endurance and resistance trainings on serum levels of VCAM-1 and ICAM-1, the eight-week training could be performed as a protective intervention in obese people.ce training group performed a modified running protocol with an exercise intensity of 50% to 70% of HRmax on the treadmill. Resistance exercises also included chest press, armpit stretch, and leg and crus presses. The training intensity was 50% to 80% of 1-RM. Serum levels of VCAM-1 and ICAM-1 were measured using ELISA commercial kits. Data were analyzed by One-way ANOVA and post hoc Tukey at the significant level P<0.05.
Results: VCAM-1 and ICAM-1 levels decreased significantly in training groups compared to the control (P = 0.0001). Significant differences were also found between the values of VCAM-1 and ICAM-1 in the endurance training group compared to the resistance training group (P = 0.0001).
Conclusion: Overall, the levels of molecules showed that the values of VCAM-1 and ICAM-1 decreased significantly in the exercise group compared to the control group, but this decrease was more significant in the endurance training group. Therefore, it seems that 8 weeks of training in obese people can be very useful and prevent many diseases.
Toktam Arbabian, Reza Rezaeshirazi, Amin Farzaneh Hesari, Habib Asgharpour,
Volume 15, Issue 4 (7-2021)
Abstract
Background and objectives: Physical activity has long been considered as the cornerstone of interventions for reducing the burden of cardiovascular diseases (CVDs). Homocysteine and obesity indices are important indicators of CVD risk. The present research aimed to evaluate homocysteine and obesity variables in female CVD patients and healthy counterparts with different physical activity levels.
Methods: This study was carried out on 85 CVD patients (40-55 yr, n=41, 60-75 yr, n=44) and 80 healthy women (40-50 yr, n=40, 60-75 yr, n=40). Subjects were divided into three groups based on their physical activity level: sedentary, moderately active and active. Serum homocysteine, body roundness index (BRI), a body shape index (ABSI), body mass index (BMI) and waist circumference (WC) were measured. Data were analyzed using the independent t-test and one-way ANOVA.
Results: Physically active middle-aged CVD patients had significantly lower BRI (p=0.022) and homocysteine (p=0.008) levels compared with the sedentary counterparts. In addition, physically-active old CVD patients had significantly lower BRI (p=0.041), ABSI (p=0.011) and homocysteine (p=0.001) compared with the sedentary counterparts. Physically-active healthy middle-aged individuals had significantly lower BRI (p=0.013) and BMI (p=0.008) levels compared with sedentary counterparts. Active elderly subjects also had significantly lower BRI (p=0.001) and WC (p=0.008) compared with the sedentary counterparts.
Conclusion: Physical activity can reduce the risk of CVD and improve health status of women by reducing homocysteine, BRI and ABSI.
Fatemeh Khodadadi, Seyed Reza Attarzadeh Hosseini, Mohammad Mosaferi,
Volume 16, Issue 2 (3-2022)
Abstract
Background and objectives: Previous investigations have shown that physical activity can improve insulin sensitivity and body composition by reducing the concentration of inflammatory biomarkers. The study aimed at evaluating effects of eight weeks of resistance training and high-intensity interval training on adropin, blood glucose markers, and body composition in overweight females.
Methods: sixteen overweight females (mean age: 30 ± 4.3 years and body mass index= 29 ± 2.6 kg/m2) were randomly assigned to a resistance training group (n=8) and a high-intensity interval training group (n=8). Participants in both groups trained three times a week for eight weeks. Body composition and serum level of blood markers were determined at baseline and after the last training session.
Results: Body mass, body fat percentage, and waist-hip ratio decreased significantly in both groups (p<0.05). VO2max significantly increased in both groups, while the changes in the resistance training group were greater than in the high-intensity interval training group (p<0.05). Insulin and HOMA-IR concentrations decreased significantly in the resistance training group (p<0.05).
Conclusion: Eight weeks of both training procedures could significantly decrease body composition markers. However, the training duration was not sufficient to alter fating blood sugar or adropin concentrations.
Ayoub Hashemi, Rahman Soori, Ebrahim Banitalebi, Siroos Choobineh ,
Volume 16, Issue 2 (3-2022)
Abstract
Background and objectives: Vascular senescence refers to specific aging-associated changes in the endothelial cells. The purpose of this study was to investigate effects of 12 weeks of resistance training with elastic bands on circulating endothelial cell-derived microRNA-92a and endothelin-1 (ET-1) in elderly women with osteosarcopenic obesity (OSO).
Methods: In the present randomized clinical trial, 48 elderly women with OSO were randomly divided into a control group (n=22) and an experimental group (n=26). The subjects in the intervention group performed 12 weeks of resistance training with elastic bands three times a week. The participants became familiar with targeted number of repetitions and OMNI-resistance exercise scale to control exercise intensity.
Results: The mean age, body fat percentage, body mass index (BMI), and bone mineral density T-score for the hip and L1-L4 lumbar spine of the subjects were 64.13±3.68 years, 45.4%±6.56, 33.1±3.71 kg/m2, and -1.86±1.42, respectively. After the 12-week resistance training, we observed a significant decrease in serum level of mir-92a in the experimental group compared to the control group (p=0.03). However, there was no significant difference between the study groups in terms of body weight, BMI, body fat percentage, total cholesterol, and ET-1 (p≥0.05).
Conclusion: The 12-week resistance training program seems to modulate and decrease serum mir-92a expression in elderly women with OSO. The lack of a significant change in BMI, body fat percentage, and ET-1 levels following the exercise training might be due to the type and intensity of the exercises.
Zahra Zojaji, Saqqa Farajtabar Behrestaq, Babisan Askari,
Volume 16, Issue 3 (5-2022)
Abstract
Background and objectives: The role of genetic components in expression of proteins involved in signaling pathways of fat and carbohydrate metabolism has been well-demonstrated. The aim of this study was to determine effects of high intensity interval training (HIIT) on glucose, insulin, and insulin resistance levels as well as IRS1 expression in gastrocnemius muscle of obese Wistar rats.
Methods: The study included 14 male, Wistar rats (aged 10 weeks) weighting 220 ± 20 g. Obesity was induced in all rats via exposure to a high-fat diet for six weeks. Then, the rats were randomly divided into a HIIT group (n=7) and a control group (n=7). The rats in the HIIT group performed treadmill running, five sessions a week, for eight weeks. Levels of fasting glucose, serum insulin, insulin resistance, and IRS1 expression in the gastrocnemius muscle of the rats were measured after the last training session. Data were analyzed by the independent t-test at statistical significance of 0.05.
Results: The HIIT intervention significantly decreased fasting glucose compared with the control group (p<0.0001). It also resulted in a significant decrease in serum insulin levels and insulin resistance compared with the control group (p<0.0001). Moreover, the HIIT training significantly increased IRS1 expression (p=0.030) in the gastrocnemius muscle of rats.
Conclusion: Based on the available evidence, the increase in insulin function and the decrease in insulin resistance can be attributed to increased IRS1 expression in the gastrocnemius muscle following HIIT training.