scholarly journals The Effect of short-term aerobic exercise and green tea consumption on MFO, ‎Fatmax, body composition and lipid profile in sedentary postmenopausal ‎‎women

2017 ◽  
Vol 6 (1) ◽  
pp. 21-31 ◽  
Author(s):  
Marjan Rostamian ◽  
Nahid Bijeh

Background: Visceral fat accumulation due to the decrease in estrogen levels, and gaining weight after menopause, increases the risk of metabolic syndrome and cardiovascular diseases in postmenopausal women; While physical activity at Fatmax and green tea consumption are recommended for increasing fat oxidation. Methods: 24 sedentary postmenopausal women were divided into two groups: exercise+supplemnet and exercise+placebo. Exercise tests were performed by gas analyzer device and blood samples were collected after 12 hours of fasting overnight in pre and post test phases. The supplement group had a daily intake of 1200 mg of green tea extract in capsule form. The training Protocol contained two weeks of aerobic exercise at an intensity of about maximum fat oxidation which was performed four times a week and each session took 40 to 50 minutes. Results: After two weeks, the amounts of weight, body mass index, waist to hip ratio, average total carbohydrate oxidation and HDL were significantly decreased in both groups (p≤0.05). The peak oxygen consumption, maximum fat oxidation, Fatmax and the average total fat oxidation increased but were not significant (p>0.05). Triglyceride (P=0.003) and visceral fat levels (P=0.044) only declined significantly in exercise+placebo group and LDL levels (P=0.043) only increased in exercise+supplement, significantly. Fat percentage also decreased in two groups which was not significant (p>0.05). Conclusions: Short-term aerobic exercise at Fatmax, alone and along with green tea consumption, reduced body weight and improved average total carbohydrate oxidation in sedentary postmenopausal women and aerobic exercise with green tea was more effective in reducing triglycerides and visceral fat levels. 

2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Lee Margolis ◽  
Marques Wilson ◽  
Claire Whitney ◽  
Christopher Carrigan ◽  
Nancy Murphy ◽  
...  

Abstract Objectives Lowlanders performing steady-state aerobic exercise during high-altitude (HA) sojourns, hypoxia mediates increased endogenous carbohydrate oxidation compared to sea level (SL). At SL, ingesting carbohydrate during exercise spares endogenous carbohydrate stores and improves endurance. However, it is unclear whether that strategy is effective at HA, as data from a recent study suggests exogenous glucose oxidation is suppressed during aerobic exercise performed 5 hr after arriving at HA. This observation has not been replicated. The objective of this study was to determine substrate oxidative responses to exogenous carbohydrate ingestion during steady-state aerobic exercise at SL and HA. Methods Using a randomized, crossover design, native lowlanders (n = 8 males, mean ± SD, age: 23 ± 2 yr, body mass: 87 ± 10 kg, and VO2peak: SL 4.3 ± 0.2 L/min and HA 2.9 ± 0.2 L/min) consumed 145 g (1.8 g/min) of glucose while performing 80 min of metabolically-matched (SL: 1.66 ± 0.14 L/min 347 ± 29 kcal, HA: 1.59 ± 0.10 L/min, 369 ± 39 kcal) treadmill exercise at SL (757 mmHg) and HA (460 mmHg) conditions after a 5 hr exposure. Total carbohydrate and fat oxidation rates (g/min) during exercise were determined by indirect calorimetry, and exogenous, muscle- and hepatic-derived glucose oxidation by tracer technique using breath and blood measurements of 13C-glucose. Results Total carbohydrate oxidation was higher (P < 0.05) at HA (2.15 ± 0.32) compared to SL (1.39 ± 0.14). Exogenous glucose oxidation was lower (P < 0.05) at HA (0.35 ± 0.07) than SL (0.44 ± 0.05). Muscle glycogen oxidation was higher at HA (1.67 ± 0.26) compared to SL (0.83 ± 0.13). There was no difference in hepatic glycogen oxidation between SL (0.13 ± 0.03) and HA (0.13 ± 0.04). Fat oxidation was lower at HA (0.05 ± 0.07) than SL (0.31 ± 0.08). Conclusions These data confirm that acute hypoxic exposure suppresses exogenous carbohydrate oxidation during steady-state exercise. Coupled with observations that fat oxidation was reduced and muscle glycogenolysis accelerated in hypoxia, these findings suggest that ingesting carbohydrate during exercise upon acute hypoxia exposure is not an effective strategy for attenuating oxidation of endogenous carbohydrate stores. Funding Sources Views expressed are the authors and do not reflect the official policy of the Army, DoD, or the U.S. Government. Supported by USAMRMC.


2012 ◽  
Vol 33 (2) ◽  
pp. 291-298 ◽  
Author(s):  
Tayebeh Roghani ◽  
Giti Torkaman ◽  
Shafieh Movasseghe ◽  
Mehdi Hedayati ◽  
Babak Goosheh ◽  
...  

Maturitas ◽  
2003 ◽  
Vol 46 (1) ◽  
pp. 59-68 ◽  
Author(s):  
Cristiana Maria Rocha Fidalgo dos Reis ◽  
Nilson Roberto de Melo ◽  
Eduardo Souza Meirelles ◽  
Denise Paranaguá Vezozzo ◽  
Alfredo Halpern

2014 ◽  
Vol 24 (6) ◽  
pp. 656-664 ◽  
Author(s):  
Brian J. Martin ◽  
Rachel B. Tan ◽  
Jenna B. Gillen ◽  
Michael E. Percival ◽  
Martin J. Gibala

Supplementation with green tea extract (GTE) in animals has been reported to induce numerous metabolic adaptations including increased fat oxidation during exercise and improved performance. However, data regarding the metabolic and physiological effects of GTE during exercise in humans are limited and equivocal.Purpose:To examine the effects of short-term GTE treatment on resting energy expenditure (REE), wholebody substrate utilization during exercise and time trial performance.Methods:Fifteen active men (24 ± 3 y; VO2peak = 48 ± 7 ml·kg·min−1; BMI = 26 ± 3 kg·m2(–1)) ingested GTE (3x per day = 1,000 mg/d) or placebo (PLA) for 2 day in a double-blind, crossover design (each separated by a 1 week wash-out period). REE was assessed in the fasted state. Subjects then ingested a standardized breakfast (~5.0 kcal·kg-1) and 90 min later performed a 60 min cycling bout at an intensity corresponding to individual maximal fat oxidation (44 ± 11% VO2peak), followed by a 250 kJ TT.Results:REE, whole-body oxygen consumption (VO2) and substrate oxidation rates during steady-state exercise were not different between treatments. However, mean heart rate (HR) was lower in GTE vs. PLA (115 ± 16 vs. 118 ± 17 beats·min−1; main effect, p = .049). Mixed venous blood [glycerol] was higher during rest and exercise after GTE vs. PLA (p = .006, main effect for treatment) but glucose, insulin and free-fatty acids were not different. Subsequent time trial performance was not different between treatments (GTE = 25:38 ± 5:32 vs. PLA = 26:08 ± 8:13 min; p = .75).Conclusion:GTE had minimal effects on whole-body substrate metabolism but significantly increased plasma glycerol and lowered heart rate during steady-state exercise, suggesting a potential increase in lipolysis and a cardiovascular effect that warrants further investigation.


2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Ayşegül Ağıl ◽  
Faruk Abıke ◽  
Arzu Daşkapan ◽  
Rıdvan Alaca ◽  
Handan Tüzün

Objective. This study was designed to determine the effects of different short-term exercise programs on menopausal symptoms, psychological health, and quality of life in postmenopausal women.Material and Methods. Forty-two women were chosen from volunteering postmenopausal women presenting to the Department of Obstetrics and Gynecology of Bayındır Hospital between March and December 2009. The women aged 45–60 years and experiencing menopause naturally were included in the study. They were randomly divided into aerobic () and resistance () exercise groups. The women exercised 3 days per week for 8 weeks under the supervision of a physiotherapist. Aerobic exercise training was performed through a bicycle ergometer. Before and after the training, lipid profiles were measured and menopausal symptoms, psychological health, depression, and the quality of life were assessed through questionnaires.Results. In both exercise groups, no significant changes in lipid profiles were observed. In the resistance exercise group, excluding the urogenital complaints, there were significant improvements in all subscales of Menopausal Rating Scale (MRS). In the resistance exercise group, excluding the phobic anxiety, there were significant improvements in all subscales of The Symptom Checklist. Depression levels significantly decreased in both groups. Improvements were observed in all subscales of menopause-specific quality of life questionnaire in both groups except for sexual symptoms.Conclusion. Resistance exercise and aerobic exercise were found to have a positive impact on menopausal symptoms, psychological health, depression, and quality of life.


2016 ◽  
Vol 67 (3) ◽  
pp. 344-352 ◽  
Author(s):  
Bong Han Lee ◽  
Tae Gyu Nam ◽  
Na Young Park ◽  
Ock K. Chun ◽  
Sung I. Koo ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document