Determinants of exercise-induced fat oxidation in obese women and men

Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Métabolisme
S HaufeJens Jordan

Abstract

Endurance training at an intensity eliciting maximal fat oxidation may have a beneficial effect on body weight and glucose metabolism in obese patients. However, the exercise intensity at which maximal fat oxidation occurs and the factors limiting fat oxidation are not well studied in this population. Obese, otherwise healthy men (n=38) and women (n=91) performed an incremental exercise test up to exhaustion on a cycle ergometer. Substrate oxidation was estimated using indirect calorimetry. Magnetic resonance tomography and spectroscopy were conducted to assess body fat distribution and intramyocellular fat content. We determined the exercise intensity at which maximal body fat oxidation occurs and assessed whether body composition, body fat distribution, intramyocellular fat content, or oxidative capacity predict exercise-induced fat oxidation. Maximal exercise-induced fat oxidation was 0.30+/-0.02 g/min in men and 0.23+/-0.01 g/min in women (p<0.05). Exercise intensity at the maximum fat oxidation was 42+/-2.2% VO (2 max) in men and 43+/-1.7% VO (2 max) in women. With multivariate analysis, exercise-induced fat oxidation was related to fat-free mass, percent fat mass, and oxidative capacity, but not to absolute fat mass, visc...Continue Reading

Citations

Oct 31, 2014·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Ilaria CrociNuala M Byrne
Dec 20, 2013·Scandinavian Journal of Medicine & Science in Sports·M RosenkildeB M Stallknecht
Dec 5, 2018·Obesity Reviews : an Official Journal of the International Association for the Study of Obesity·L Isacco, J L Miles-Chan
Jun 8, 2018·Frontiers in Physiology·Ed MaunderAndrew E Kilding
Nov 1, 2020·International Journal of Environmental Research and Public Health·Isaac A Chávez-GuevaraArnulfo Ramos-Jiménez
Feb 16, 2021·International Journal of Sport Nutrition and Exercise Metabolism·Oliver J Chrzanowski-SmithJavier T Gonzalez
Nov 17, 2020·Frontiers in Physiology·Laurie IsaccoNathalie Boisseau

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