Volume 27, Issue 1 (March 2023)                   Physiol Pharmacol 2023, 27(1): 16-27 | Back to browse issues page

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Das D, Das A K, Mondal S, Mondal H, Majumder R. Respiratory Exchange Ratio in Obese and Non- obese Sedentary Indian Young Adults in Moderate-and Vigorous-intensity Exercise. Physiol Pharmacol 2023; 27 (1) :16-27
URL: http://ppj.phypha.ir/article-1-1851-en.html
Abstract:   (1914 Views)
Introduction: Respiratory exchange ratio (RER) is the ratio between produced CO2 and used O2 for body metabolism. It indicates the type of fuel that is metabolized in the body. This study aimed to measure and compare the RER in non-obese and obese sedentary young adults in rest, moderate-intensity, and vigorous-intensity exercise.
Methods: This cross-sectional study was conducted with 23 non-obese and 24 obese sedentary young adults. Resting RER was measured with 12-h fasting after 15-min rest with an automated gas analyzer. Then, RER was measured during steady moderate-intensity and vigorous-intensity exercise on a cycle ergometer. RER was compared between males and females, non-obese and obese in resting, moderate-intensity, and vigorous-intensity exercise by t-test.
Results: The Mean age of the non-obese and obese groups was 19.35±1.11 and 19.79±0.78 years, respectively. Males showed higher RER (in resting and moderate-intensity exercise) than females. In comparison to non-obese group, the obese group showed higher RER in resting (0.802±0.018 versus 0.821±0.022, P=0.001), moderate-intensity exercise (0.812±0.013 versus 0.83±0.02, P<0.001), and vigorous-intensity exercise (0.853±0.43 versus 0.914±0.032, P<0.001). Concerning resting value, RER significantly increased during moderate- and vigorous-intensity exercise in both the non-obese and obese groups.
Conclusion: Obese young adults use relatively more carbohydrates as fuel than non-obese in both resting conditions and during exercise. When the intensity of exercise increased, both obese and non-obese showed higher RER which indicates that sedentary young adults use relatively more carbohydrates as fuel in the higher grade of exercise.
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1. Adams R. Revised Physical Activity Readiness Questionnaire. Can Fam Physician 1999;45:992‐1005.
2. Arad AD, Basile AJ, Albu J, DiMenna FJ. No Influence of Overweight/Obesity on Exercise Lipid Oxidation: A Systematic Review. Int J Mol Sci 2020;21:1614. [DOI:10.3390%2Fijms21051614]
3. Balcı SS. Comparison of substrate oxidation during walking and running in normal-weight and overweight/obese men. Obes Facts 2012;5:327‐38. [DOI:10.1159/000339504]
4. Beatty J, Melanson K. Examining changes in respiratory exchange ratio within an 8-week weight loss intervention. J Hum Nutr Diet 2019;32:737‐44. [DOI:10.1111/jhn.12664]
5. Cavuoto LA, Maikala RV. Obesity and the Role of Short Duration Submaximal Work on Cardiovascular and Cerebral Hemodynamics. PLoS One 2016;11:e0153826. [DOI:10.1371/journal.pone.0153826]
6. Chatzinikolaou A, Fatouros I, Petridou A, Jamurtas A, Avloniti A, Douroudos I, et al. Adipose tissue lipolysis is upregulated in lean and obese men during acute resistance exercise. Diabetes Care 2008;31:1397‐9. [DOI:10.2337/dc08-0072]
7. Coggan AR, Raguso CA, Gastaldelli A, Sidossis LS, Yeckel CW. Fat metabolism during high-intensity exercise in endurance-trained and untrained men. Metabolism 2000;49:122-8. [DOI:10.1016/s0026-0495(00)90963-6]
8. Geerling BJ, Alles MS, Murgatroyd PR, Goldberg GR, Harding M, Prentice AM. Fatness in relation to substrate oxidation during exercise. Int J Obes Relat Metab Disord 1994;18:453‐9.
9. Ghasemi A, Zahediasl S. Normality tests for statistical analysis: a guide for non-statisticians. Int J Endocrinol Metab 2012;10:486-9. [DOI:10.5812/ijem.3505]
10. Goedecke JH, St Clair Gibson A, Grobler L, Collins M, Noakes TD, Lambert EV. Determinants of the variability in respiratory exchange ratio at rest and during exercise in trained athletes. Am J Physiol Endocrinol Metab 2000;279:E1325-34. [DOI:10.1152/ajpendo.2000.279.6.E1325]
11. Goodpaster BH, Wolfe RR, Kelley DE. Effects of obesity on substrate utilization during exercise. Obes Res 2002;10:575‐84. [DOI:10.1038/oby.2002.78]
12. Gupta RD, Ramachandran R, Venkatesan P, Anoop S, Joseph M, Thomas N. Indirect calorimetry: From bench to bedside. Indian J Endocr Metab 2017;21:594-9. [DOI:10.4103/ijem.ijem_484_16]
13. Haugen HA, Chan LN, Li F. Indirect calorimetry: a practical guide for clinicians. Nutr Clin Pract 2007;22:377‐88. [DOI:10.1177/0115426507022004377]
14. Hirsch KR, Smith-Ryan AE, Blue MN, Mock MG, Trexler ET, Ondrak KS. Metabolic characterization of overweight and obese adults. Phys Sportsmed 2016;44:362‐72. [DOI:10.1080%2F00913847.2016.1248222]
15. Houmard JA. Intramuscular lipid oxidation and obesity. Am J Physiol Regul Integr Comp Physiol 2008;294:R1111‐6. [DOI:10.1152/ajpregu.00396.2007]
16. Kyle UG, Gremion G, Genton L, Slosman DO, Golay A, Pichard C. Physical activity and fat-free and fat mass by bioelectrical impedance in 3853 adults. Med Sci Sports Exerc 2001;33:576‐84. [DOI:10.1097/00005768-200104000-00011]
17. Leicht AS, Sinclair WH, Spinks WL. Effect of exercise mode on heart rate variability during steady state exercise. Eur J Appl Physiol 2008;102:195-204. [DOI:10.1007/s00421-007-0574-9]
18. Magnon V, Dutheil F, Auxiette C. Sedentariness: A Need for a Definition. Front Public Health 2018;6:372. [DOI:10.3389/fpubh.2018.00372]
19. Mahajan K, Batra A. Obesity in adult asian indians- the ideal BMI cut-off. Indian Heart J 2018;70:195. [DOI:10.1016/j.ihj.2017.11.020]
20. Misra A, Chowbey P, Makkar BM, Vikram NK, Wasir JS, Chadha D, et al. Consensus statement for diagnosis of obesity, abdominal obesity and the metabolic syndrome for Asian Indians and recommendations for physical activity, medical and surgical management. J Assoc Physicians India 2009;57:163‐70.
21. Mittendorfer B, Fields DA, Klein S. Excess body fat in men decreases plasma fatty acid availability and oxidation during endurance exercise. Am J Physiol Endocrinol Metab 2004;286:E354‐62. [DOI:10.1152/ajpendo.00301.2003]
22. Mittendorfer B, Horowitz JF, Klein S. Effect of gender on lipid kinetics during endurance exercise of moderate intensity in untrained subjects. Am J Physiol Endocrinol Metab 2002;283:E58‐65. [DOI:10.1152/ajpendo.00504.2001]
23. Mondal H, Mishra SP. Effect of BMI, Body Fat Percentage and Fat Free Mass on Maximal Oxygen Consumption in Healthy Young Adults. J Clin Diagn Res 2017;11:CC17-20. [DOI:10.7860/JCDR/2017/25465.10039]
24. Mondal H, Mondal S, Baidya C. Competency in home body fat monitoring by portable devices based on bioelectrical impedance analysis: A pilot study. J Educ Health Promot 2019;8:223.
25. Mul JD, Stanford KI, Hirshman MF, Goodyear LJ. Exercise and Regulation of Carbohydrate Metabolism. Prog Mol Biol Transl Sci 2015;135:17‐37. [DOI:10.1016/bs.pmbts.2015.07.020]
26. Pendergast DR, Leddy JJ, Venkatraman JT. A perspective on fat intake in athletes. J Am Coll Nutr 2000;19:345-50. [DOI:10.1080/07315724.2000.10718930]
27. Pérez-Martin A, Dumortier M, Raynaud E, Brun JF, Fédou C, Bringer J, et al. Balance of substrate oxidation during submaximal exercise in lean and obese people. Diabetes Metab 2001;27:466‐74.
28. Ramos-Jiménez A, Hernández-Torres RP, Torres-Durán PV, Romero-Gonzalez J, Mascher D, Posadas-Romero C, et al. The Respiratory Exchange Ratio is Associated with Fitness Indicators Both in Trained and Untrained Men: A Possible Application for People with Reduced Exercise Tolerance. Clin Med Circ Respirat Pulm Med 2008;2:1‐9. [DOI:10.4137/CCRPM.S449]
29. Rimbert V, Boirie Y, Bedu M, Hocquette JF, Ritz P, Morio B. Muscle fat oxidative capacity is not impaired by age but by physical inactivity: association with insulin sensitivity. FASEB J 2004;18:737‐9. [DOI:10.1096/fj.03-1104fje]
30. Roy S, McCrory J. Validation of Maximal Heart Rate Prediction Equations Based on Sex and Physical Activity Status. Int J Exerc Sci 2015;8:318-30.
31. Schrauwen P, van Aggel-Leijssen DP, Hul G, Wagenmakers AJM, Vidal H, Saris WHM, et al. The effect of a 3-month low-intensity endurance training program on fat oxidation and acetyl-CoA carboxylase-2 expression. Diabetes 2002;51:2220‐6. [DOI:10.2337/diabetes.51.7.2220]
32. Smorawiński J, Nazar K, Kaciuba-Uscilko H, Kamińska E, Cybulski G, Kodrzycka A, et al. Effects of 3-day bed rest on physiological responses to graded exercise in athletes and sedentary men. J Appl Physiol 2001;91:249-57. [DOI:10.1152/jappl.2001.91.1.249]
33. Shen T, Wen X. Heart-rate-based prediction of velocity at lactate threshold in ordinary adults. J Exerc Sci Fit 2019;17:108-112. [DOI:10.1016/j.jesf.2019.06.002]
34. Toth MJ, Gardner AW, Arciero PJ, Calles-Escandon J, Poehlman ET. Gender differences in fat oxidation and sympathetic nervous system activity at rest and during submaximal exercise in older individuals. Clin Sci (Lond) 1998;95:59‐66. [DOI:10.1042/cs0950059]
35. Verma M, Rajput M, Kishore K, Kathirvel S. Asian BMI criteria are better than WHO criteria in predicting Hypertension: A cross-sectional study from rural India. J Family Med Prim Care 2019;8:2095-2100. [DOI:10.4103/jfmpc.jfmpc_257_19]
36. Vilchis-Gil J, Galván-Portillo M, Klünder-Klünder M, Cruz M, Flores-Huerta S. Food habits, physical activities and sedentary lifestyles of eutrophic and obese school children: a case-control study. BMC Public Health 2015;15:124. [DOI:10.1186/s12889-015-1491-1]
37. Villareal DT, Apovian CM, Kushner RF, Klein S; American Society for Nutrition; NAASO, The Obesity Society. Obesity in older adults: technical review and position statement of the American Society for Nutrition and NAASO, The Obesity Society. Am J Clin Nutr 2005;82:923‐34. [DOI:10.1093/ajcn/82.5.923]

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