scholarly journals Inter-Day Reliability of Resting Metabolic Rate and Maximal Fat Oxidation during Exercise in Healthy Men Using the Ergostik Gas Analyzer

Nutrients ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 4308
Author(s):  
Lidia Robles-González ◽  
Jorge Gutiérrez-Hellín ◽  
Millán Aguilar-Navarro ◽  
Carlos Ruiz-Moreno ◽  
Alejandro Muñoz ◽  
...  
Keyword(s):  
Metabolic Rate ◽  
Repeated Measures ◽  
Respiratory Exchange Ratio ◽  
Resting Metabolic Rate ◽  
Fat Oxidation ◽  
Gas Analyzer ◽  
Healthy Men ◽  
Oxidation Rates ◽  
Maximal Fat Oxidation ◽  
Experimental Trials

The attainment of high inter-day reliability is crucial to determine changes in resting metabolic rate (RMR), respiratory exchange ratio (RER), maximal fat oxidation during exercise (MFO) and the intensity that elicits MFO (Fatmax) after an intervention. This study aimed to analyze the inter-day reliability of RMR, RER, MFO and Fatmax in healthy adults using the Ergostik gas analyzer. Fourteen healthy men (age: 24.4 ± 5.0 years, maximum oxygen uptake (VO2max): 47.5 ± 11.9 mL/kg/min) participated in a repeated-measures study. The study consisted of two identical experimental trials (Day 1 and Day 2) in which the participants underwent an indirect calorimetry assessment at resting and during an incremental exercise test. Stoichiometric equations were used to calculate energy expenditure and substrate oxidation rates. There were no significant differences when comparing RMR (1999.3 ± 273.9 vs. 1955.7 ± 362.6 kcal/day, p = 0.389), RER (0.87 ± 0.05 vs. 0.89 ± 0.05, p = 0.143), MFO (0.32 ± 0.20 vs. 0.31 ± 0.20 g/min, p = 0.776) and Fatmax (45.0 ± 8.6 vs. 46.4 ± 8.4% VO2max, p = 0.435) values in Day 1 vs. Day 2. The inter-day coefficient of variation for RMR, RER, MFO and Fatmax were 4.85 ± 5.48%, 3.22 ± 3.14%, 7.78 ± 5.51%, and 6.51 ± 8.04%, respectively. In summary, the current results show a good inter-day reliability when RMR, RER, MFO and Fatmax are determined in healthy men using the Ergostik gas analyzer.

High-level medium-chain triglyceride feeding and energy expenditure in normal-weight women

2007 ◽  
Vol 85 (5) ◽  
pp. 507-513 ◽  
Author(s):  
Elena Alexandrou ◽  
Gene R. Herzberg ◽  
Matthew D. White
Keyword(s):  
Energy Expenditure ◽  
Metabolic Rate ◽  
Energy Intake ◽  
Resting Metabolic Rate ◽  
Medium Chain Triglyceride ◽  
Fat Oxidation ◽  
Normal Weight ◽  
Medium Chain ◽  
Oxidation Rates ◽  
Postprandial Energy Expenditure

The objective of this study was to assess how short-term feeding of high levels of dietary medium-chain triglyceride (MCT) affect energy expenditure and postprandial substrate oxidation rates in normal-weight, premenopausal women. Eight healthy women were fed both a MCT-rich and an isocaloric long-chain triglyceride (LCT)-rich diet for two 1-week periods separated by a minimum of 21 days. The energy intake in each diet was 45% carbohydrates, 40% fat, and 15% protein. The 2 diets had either 60.81% or 1.11% of total fat energy from MCT with the remaining fat energy intake from LCT. On days 1 and 7 of each diet, resting metabolic rate and postprandial energy expenditure (EE) were measured by indirect calorimetry with a ventilated hood. Results indicated on days 1 and 7, there were no significant differences between diets for resting metabolic rate or mean postprandial EE. On both days 1 and 7, fat oxidation for the MCT-rich diet was significantly greater (0.0001 ≤ p ≤ 0.04) than that for the LCT-rich diet at different time points across the 5.5 h postprandial period. In conclusion, for premenopausal, normal-weight women consuming a diet with 25% of the energy content from MCT, there were no changes in resting metabolic rate, transient increases in postprandial energy expenditure, and significant increases in postprandial fat oxidation.

Substrate oxidation during exercise in taekwondo athletes: impact of aerobic fitness status

2020 ◽  
Vol 16 (5) ◽  
pp. 371-376
Author(s):  
B. Taati ◽  
H. Rohani
Keyword(s):  
Aerobic Fitness ◽  
Oxidation Rate ◽  
Fat Oxidation ◽  
Potential Effect ◽  
Substrate Oxidation ◽  
Training Experience ◽  
Male Athletes ◽  
Fitness Level ◽  
Oxidation Rates ◽  
Maximal Fat Oxidation

The present study aimed to investigate the potential effect of different aerobic fitness levels on substrate oxidation in trained taekwondo athletes. 57 male athletes (age 21.10±7.79 years; VO2max 50.67±6.67 ml/kg/min) with regular weekly taekwondo training and training experience of at least three years completed a graded exercise test to exhaustion on a treadmill. Maximal fat oxidation (MFO), the exercise intensity related to MFO (Fatmax), and carbohydrate (CHO) oxidation rate were measured using indirect calorimetry methods. The athletes then were divided into a low (<50 ml/kg/min, n=18) and high (>50 ml/kg/min, n=39) VO2max group. The average MFO was higher in the high VO2max group than in the low VO2max group (0.46±0.19 vs 0.28±0.11 g/min; P<0.001). Although Fatmax tended toward higher values in the high VO2max group, no difference was observed between the groups (49.15±15.22 vs 42.42±12.37% of VO2max; P=0.18). It was also shown that the high VO2max group had a lower CHO oxidation rate and a higher fat oxidation rate at given exercise intensities. In conclusion, it seems that MFO and substrate oxidation rates in taekwondo athletes can be influenced by aerobic fitness level such that the athletes with higher VO2max appeared to use more fat as a fuel source for energy supply during a given exercise.

Abdomally Obese Women With Metabolic Syndrome Have Higher Maximal Fat Oxidation Rates During Submaximal Treadmill Exercise.

2009 ◽  
Vol 41 ◽  
pp. 523
Author(s):  
Brian A. Irving ◽  
Corey A. Rynders ◽  
Siddhartha S. Angadi ◽  
Nathan Y. Weltman ◽  
Glenn A. Gaesser ◽  
...  
Keyword(s):  
Metabolic Syndrome ◽  
Treadmill Exercise ◽  
Fat Oxidation ◽  
Obese Women ◽  
Oxidation Rates ◽  
Maximal Fat Oxidation

Maximal fat oxidation rates in endurance trained and untrained women

2006 ◽  
Vol 98 (5) ◽  
pp. 497-506 ◽  
Author(s):  
Anne Bach Stisen ◽  
Ole Stougaard ◽  
Josef Langfort ◽  
Jørn Wulff Helge ◽  
Kent Sahlin ◽  
...  
Keyword(s):  
Fat Oxidation ◽  
Oxidation Rates ◽  
Maximal Fat Oxidation

Effect of Acute Resistance Exercise on Postexercise Oxygen Consumption and Resting Metabolic Rate in Young Women

2000 ◽  
Vol 10 (1) ◽  
pp. 71-81 ◽  
Author(s):  
Kristin L. Osterberg ◽  
Christopher L. Melby
Keyword(s):  
Oxygen Consumption ◽  
Metabolic Rate ◽  
Resistance Exercise ◽  
Young Women ◽  
Resting Metabolic Rate ◽  
Recovery Period ◽  
Fat Oxidation ◽  
Resistive Exercise ◽  
Fasted State ◽  
Postexercise Recovery

This study determined the effect of an intense bout of resistive exercise on postexercise oxygen consumption, resting metabolic rate, and resting fat oxidation in young women (N = 7, ages 22-35). On the morning of Day 1, resting metabolic rate (RMR) was measured by indirect calorimetry. At 13:00 hr, preexercise resting oxygen consumption was measured followed by 100 min of resistive exercise. Postexercise oxygen consumption was then measured for a 3-hr recovery period. On the following morning (Day 2), RMR was once again measured in a fasted state at 07:00. Postexercise oxygen consumption remained elevated during the entire 3-hr postexercise recovery period compared to the pre-exercise baseline. Resting metabolic rate was increased by 4.2% (p < .05) from Day 1 (morning prior to exercise: 1,419 ± 58 kcal/24 hr) compared to Day 2 (16 hr following exercise: 1,479 ± 65 kcal/24 hr). Resting fat oxidation as determined by the respiratory exchange ratio was also significantly elevated on Day 2 compared to Day 1. These results indicate that among young women, acute strenuous resistance exercise of the nature used in this study is capable of producing modest but prolonged elevations of postexercise metabolic rate and possibly fat oxidation.

The Effects of Exercise Modalities on the Maximal Fat Oxidation Rates in Women

2008 ◽  
Vol 40 (Supplement) ◽  
pp. S4
Author(s):  
Kelly P. Manning Massey ◽  
Jeffrey C. Rupp ◽  
Jurine Owen
Keyword(s):  
Fat Oxidation ◽  
Oxidation Rates ◽  
Maximal Fat Oxidation

scholarly journals Comparison between continuous and intermittent submaximal exercise at the intensity of maximal fat oxidation

2016 ◽  
Vol 13 (3) ◽  
pp. 4604
Author(s):  
Gökhan İpekoğlu ◽  
Şükrü Serdar Balcı
Keyword(s):  
Oxygen Consumption ◽  
Exercise Intensity ◽  
Oxidation Rate ◽  
Maximal Oxygen Consumption ◽  
Fat Oxidation ◽  
Cycle Ergometer ◽  
Whole Body ◽  
Oxidation Rates ◽  
Maximal Fat Oxidation ◽  
Protocol Test

The aim of the study was to determine the rate of fat oxidation during continuous and intermittent acute endurance exercise. Eleven healthy untrained men participated in this study. Subjects performed Bruce protocol test on cycle ergometer to determine maximal oxygen consumption (VO2max).  The exercise intensity in which the highest fat oxidation rate occurs was determined in this exercise test for each subject. Oxygen uptake (VO2) and carbon dioxide (VCO2) production during the exercises were followed by respiratory gas analyzer and whole-body fat oxidation was calculated by indirect calorimeter equations. Subjects performed 45min intermittent (IE) and continuous (CE) exercises in respiratory exchange ratio (RER) at intensity correspondent at the highest fat oxidation rate (Fat max). The peak fat oxidation rate was equal to 40.6% of maximum oxygen consumption of subjects. The changes occurring with time in fat (F=20.67) and carbohydrate (F=19.44) oxidation rates were statistically significant (P<0.01). However, the changes of fat and carbohydrate (CHO) oxidation with time did not show any statistically significant differences between the continuous and intermittent exercises (P>0.05). The results of the study indicate that the continuous and intermittent exercises performed at the exercise intensity ensuring maximum fat oxidation rate provide similar fat oxidation. Especially, for the individuals starting regular exercise applications newly, it can be said that similar positive results regarding fat oxidation can also be obtained by avoiding the insipidity of long lasting exercises and giving breaks.

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