Showing 3 results for Energy Expenditure
Maryam Djamnezhad , Kurosh Djafarian, Mostafa Qorbani, Asal Ataie-Jafari, Saeed Hosseini,
Volume 14, Issue 1 (1-2015)
Abstract
Background: There is increasing interest about the relationship between metabolism, obesity and function of thyroid hormones in recent decades. This study aimed to determine the validity of a “thyroid and metabolism questionnaire” and its relationship with metabolism status and function of thyroid hormones.
Methods: It was a descriptive cross-sectional study on 164 people aged 20-64 years who were selected randomly from nutrition clinic. “Thyroid and Metabolism questionnaire” including 25 questions were completed for everyone. Biochemical parameters including serum level of T3, T4 and TSH were measured. Resting energy expenditure [REE] was measured by indirect calorimeter.
Results: The mean measured REE and calculated with Harris-Benedict formula were 1826.7 ± 475.34 and 2277.6 ± 454.54 kcal in men and 1410.8 ± 205.5 and 1670.73 ± 136.10 kcal in women respectively. The final score of this questionnaire had no significant association with measured REE. REE showed indirect relationship with serum level of T3, T4, T3/T4 and inverse relationship with TSH. Metabolism status of every participant was obtained via measuring and calculating REE with set and formula. The metabolism status of participants showed no agreements with metabolism status that predicted from “Thyroid and Metabolism” questionnaire. There was no significant association between metabolism status that was measured by indirect calorimeter and calculated from “Thyroid and Metabolism” questionnaire. From 25 questions of this questionnaire, only questions number 1, 4, 16 and 23 showed significant association with measured REE [P< 0.05].
Conclusion: Results of this study showed that “Thyroid and Metabolism” questionnaire had internal consistency, but not validity.
Hamed Rezaei Nasab, Roohollah Ranjbar, Abdol Hamid Habibi, Saeed Shakerian,
Volume 14, Issue 2 (1-2015)
Abstract
Background: The purpose of this study was to compare three intensities of acute aerobic exercise on plasma visfatin concentration in type 2 diabetic males. Methods: Ten men with type 2 diabetes (mean ± SD age 52.6 ± 3.6 years, height 171.3 ± 6.7 cm, Weight 87.58 ± 4.7 kg) participated in the study. In the first session, anthropometric measurements, body composition, and peak oxygen uptake (VO2peak) was measured in all subjects. In the next sessions, subjects completed three acute aerobic exercises on separate days in a crossover design. The three exercise trials performed at intensity of 40%, 60%, and 80% VO2peak after fasting for at least 10 hours. Energy expenditure was 300 kcal for each exercise trial. Blood samples before exercise, immediately after and 24 hours after exercise were collected for measuring visfatin, glucose and insulin. Results: The results showed no significance interaction (p>0.05) between exercise and sampling time. This analysis also revealed significance in the main effects (p>0.05) of the two factors (exercise and sampling time). Pearson correlation showed that there was significant relationship between visfatin and insulin (p<0.05). Conclusion: According to the present results, we can conclude that acute aerobic exercise at different intensities with 300 kcal energy expenditure will not change visfatin levels in type 2 diabetes.
Vahid Maleki, Mohamad Reza Mohajeri Tehrani, Ehsaneh Taheri, Mostafa Qorbani, Mohsen Sedighiyan, Saeed Hoseini,
Volume 16, Issue 2 (1-2017)
Abstract
Background: The major cause of obesity is an imbalance between energy intake and energy expenditure and resting energy expenditure (REE) is the most important determining factor in metabolism because it can reduce obesity and body fat mass gain. Overt hypothyroidism is associated with a lower resting energy expenditure (REE). With treatment, the resting energy expenditure (REE) will be normal. But a group of patients with treatment and normal serum level of TSH and thyroid hormones, Continue to complain of the lack of improvement of Clinical signs of overt hypothyroidism. This study is designed whether patients that have Clinical signs of overt hypothyroidism in compared with patients without Clinical signs, resting metabolic rate, body composition and lipid profile are different or not.
Methods: This study is a descriptive and comparative study on 100 women with overt hypothyroidism are treated with levothyroxine. The patients were divided into 2 groups of 50 patients with and without clinical signs. All patients were matched for age and BMI and menstrual cycle. 2 groups regarding anthropometric measurements, resting energy expenditure (REE), body composition, thyroid hormones, lipid profile and diet were compared with each other.
Results: The average resting energy expenditure (REE) and adjusted of it for weight was significantly lower in the group with Clinical signs (Pvalue<0.03). But there was no significant difference between the 2 groups for the form of an adjustment for fat free mass (FMM) and FT3. The body fat mass (FM) was higher in the group with Clinical signs (Pvalue<0.005).But there was no significant difference between the 2 groups in the percentage of body fat mass and fat free mass (FMM). Serum levels of TSH, TF4, FT4, TT3, FT3, total cholesterol, HDL, LDL, there was no significant difference between the 2 groups. But the level of blood triglycerides (TG) in the group with Clinical signs was significantly higher than the group without Clinical signs (Pvalue<0.01).
Conclusion: Patients with Clinical signs, lower resting energy expenditure (REE) and fat mass (FM) and triglycerides blood (TG) is higher than in patients without Clinical signs.
