Similar rates of fat oxidation during graded submaximal exercise in women of different body composition

Autor: Kerherve, Hugo A., Harvey, Leonie M., Eagles, Alexander N., Kerhervé, Hugo, Harvey, Leonie, Eagles, Alexander, Mclellan, Chris, Lovell, Dale
Přispěvatelé: University of the Sunshine Coast (USC), Laboratoire Mouvement Sport Santé (M2S), Université de Rennes (UR)-École normale supérieure - Rennes (ENS Rennes)-Université de Brest (UBO)-Université de Rennes 2 (UR2)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), University of Southern Queensland (USQ), This study has received no specific funding, École normale supérieure - Cachan (ENS Cachan)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université de Brest (UBO)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Physiology
[SDV]Life Sciences [q-bio]
Adipose tissue
030204 cardiovascular system & hematology
Overweight
Biochemistry
Body Mass Index
Fats
0302 clinical medicine
Medicine and Health Sciences
Public and Occupational Health
Multidisciplinary
Chemical Reactions
VO2 max
Lipids
Sports Science
Exercise Therapy
Chemistry
Adipose Tissue
Physiological Parameters
Connective Tissue
Physical Sciences
Body Composition
Medicine
Female
medicine.symptom
Anatomy
Exercise prescription
Oxidation-Reduction
Research Article
Adult
Science
Physical Exertion
030209 endocrinology & metabolism
Bioenergetics
03 medical and health sciences
Oxygen Consumption
Oxidation
medicine
Humans
Obesity
Sports and Exercise Medicine
Exercise
business.industry
Body Weight
Biology and Life Sciences
Physical Activity
medicine.disease
Intensity (physics)
Oxygen
Biological Tissue
Physical Fitness
Exercise intensity
Exercise Test
business
Energy Metabolism
Body mass index
Zdroj: PLoS ONE
PLoS ONE, 2020, 15 (11), ⟨10.1371/journal.pone.0242551⟩
PLoS ONE, Vol 15, Iss 11, p e0242551 (2020)
PLoS ONE, Public Library of Science, 2020, 15 (11), pp.e0242551. ⟨10.1371/journal.pone.0242551⟩
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0242551⟩
Popis: Background Moderate intensity exercise ranging 40–60% of maximum oxygen uptake is advised to promote energy expenditure and fat oxidation in overweight and obese people. Although fat oxidation has been shown to be highly variable among individual, there is still a relative uncertainty regarding exercise prescription for women specifically. This article aimed to determine whether indicators of body composition can be used to narrow the exercise intensity range for exercise prescription in women. Methods A total of 35 healthy women (age 30.8±9.5 yr) classified according to their BMI in normal weight (NOR; ≤24.9 kg·m2), overweight (OVW; 25–29.9 kg·m2) and obese groups (OBE; ≥30 kg·m2) completed a submaximal graded test (intensities eliciting ~30%, 40%, 50% and 60% of maximum oxygen uptake). Blood lactate, perceived exertion and absolute and relative substrate oxidation for fat (OXFAT) and carbohydrates (OXCHO) were measured at each stage. Results Perceived exertion and blood lactate increased as a function of exercise but did not differ across groups. There were no significant changes in absolute and relative OXFAT across groups, or as a function of exercise intensity. Peak OXFAT occurred at the 40%, 50% and 40% stages for NOR, OVW and OBE groups, respectively, with no significant differences across groups. Conclusion We measured no differences, but considerable inter-individual variation, in fat oxidation in women of different body composition. This result is in agreement with previous research based on exercise performed at constant rate and in independent participant groups. Our findings do not support the fat oxidation hypothesis, and further emphasise the perspective that exercise prescription should be individualised and likely be based on considerations other than substrate oxidation.
Databáze: OpenAIRE
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