Acute effects of fasting aerobic exercise on carbohydrate and fat metabolism and utilization in sedentary overweight and obese adults: A pilot study

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dc.contributor.authorMorán, Matías
dc.contributor.authorPeñailillo, Luis
dc.date.accessioned2024-04-18T23:27:28Z
dc.date.available2024-04-18T23:27:28Z
dc.date.issued2022-06
dc.descriptionIndexación: Scopus.
dc.description.abstractPurpose: To compare the acute effects of fasting and postprandial aerobic exercise on carbohydrate and fat utilization in sedentary overweight and obese men. Methods: Quantitative, experimental, randomized, crossover design. Seven seden-tary, overweight or obese (body mass index [BMI]= 29.3 ± 1.9 kg/m2) adult men (37.9 ± 2.4 years) performed 60 min of aerobic exercise at 50% of maximal aerobic power both fasting (FASTED) and postprandial (FED). The first exercise type was randomly assigned. We measured the respiratory exchange ratio (RER) by basal indirect calorimetry during and after exercise; glycemia, ketone bodies and capillary lactate at baseline, pre-start, immediately and 40 minutes post exercise were measured in each exercise protocol. Oxidation of carbohydrates and fats was estimated from the RER according to stoichiometric equations. Results: During exercise there were no significant differences in the use of substrates between FASTED and FED. After exercise, only FASTED had an increase (p<0.05) in fat oxidation relative to body (Pre 0.010 ± 0.006 kJ/min/kg vs Post 0.020 ± 0.014 kJ/min/kg), carbohydrate oxidation (Pre 0.060 ± 0.010 kJ/min/kg vs Post 0.070 ± 0.012 kJ/min/kg), and total energy expenditure (Pre 0.070 ± 0.017 kJ/min/kg vs Post 0.090 ± 0.028 kJ/min/kg). There were no differences in FED, nor significant differences between FASTED and FED. Conclusion: Moderate aerobic fasting exercise increases post-session fat and carbohydrate oxidation in overweight and obese men. This could be useful for application in sedentary patients with excess weight. © 2022, Sociedad Chilena de Nutricion Bromatologia y Toxilogica. All rights reserved.
dc.description.urihttps://www-scielo-cl.recursosbiblioteca.unab.cl/scielo.php?script=sci_arttext&pid=S0717-75182022000300333&lng=en&nrm=iso&tlng=en
dc.identifier.citationRevista Chilena de Nutricion, Volume 49, Issue 3, Pages 333 - 343, June 2022
dc.identifier.doi10.4067/s0717-75182022000300333
dc.identifier.issn0717-7518
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/56116
dc.language.isoes
dc.publisherSociedad Chilena de Nutricion Bromatologia y Toxilogica
dc.rights.licenseCC BY-NC 4.0 DEED Attribution-NonCommercial 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/deed.en
dc.subjectAerobic exercise
dc.subjectEnergy expenditure
dc.subjectFast
dc.subjectIndirect calorimetry
dc.subjectSubstrate oxidation
dc.titleAcute effects of fasting aerobic exercise on carbohydrate and fat metabolism and utilization in sedentary overweight and obese adults: A pilot study
dc.title.alternativeEfectos agudos del ejercicio aeróbico en estado de ayuno sobre el metabolismo y utilización de carbohidratos y grasas en adultos sedentarios con sobrepeso y obesidad: Un estudio piloto
dc.typeArtículo
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