Mechanical efficiency: associations with body composition and glycemic profile in healthy adults.

Autor: Marin-Couture E; Department of Kinesiology, Faculty of Medicine, PEPS, Université Laval, Quebec City, G1V 0A6, Canada.; Centre Nutrition, Santé et Société (NUTRISS), Institute of Nutrition and Functional Food (INAF), Quebec City, Canada.; Centre de Recherche en Santé Durable - VITAM, CIUSSS de la Capitale-Nationale, Quebec City, Canada., Pérusse L; Department of Kinesiology, Faculty of Medicine, PEPS, Université Laval, Quebec City, G1V 0A6, Canada.; Centre Nutrition, Santé et Société (NUTRISS), Institute of Nutrition and Functional Food (INAF), Quebec City, Canada., Bouchard C; Pennington Biomedical Research Center, Baton Rouge, LA, USA., Schrauwen P; Department of Nutrition and Movement Sciences, Maastricht University Medical Center, Maastricht, The Netherlands., Joanisse DR; Department of Kinesiology, Faculty of Medicine, PEPS, Université Laval, Quebec City, G1V 0A6, Canada.; Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, Canada., Tremblay A; Department of Kinesiology, Faculty of Medicine, PEPS, Université Laval, Quebec City, G1V 0A6, Canada. angelo.tremblay@kin.ulaval.ca.; Centre Nutrition, Santé et Société (NUTRISS), Institute of Nutrition and Functional Food (INAF), Quebec City, Canada. angelo.tremblay@kin.ulaval.ca.; Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, Canada. angelo.tremblay@kin.ulaval.ca.
Jazyk: angličtina
Zdroj: European journal of applied physiology [Eur J Appl Physiol] 2024 Jul 28. Date of Electronic Publication: 2024 Jul 28.
DOI: 10.1007/s00421-024-05528-w
Abstrakt: The aim of this study was to assess the association between net mechanical efficiency (NME) and body composition and glycemic profile, in middle-aged (38.3 ± 14.3 years) participants from the Quebec Family Study (QFS). Analyses were completed on a sample of 605 participants (271 males and 334 females) who performed a submaximal exercise test on an ergometer consisting of three consecutive 6-min workloads at increasing intensity during which respiratory gas exchange was assessed. The calculation of NME [power output/ (vO 2 -vO 2 seated before exercise)] was based on the values of the last 3 min of the first workload at a targeted power output of 30 W. Correlations between NME and dependent variables were computed separately in males and females. Associations between NME and body composition and glucose-insulin variables were assessed by comparing groups of subjects categorized in sex-specific tertiles of NME after adjustments for age. Significant negative correlations were observed between NME and body composition and glycemic profile in both sexes. Comparison across tertiles showed that individuals with high NME displayed more favorable adiposity and glycemic profiles. These differences remained significant after further adjustments for participation in vigorous physical activity, cardiorespiratory fitness, and mean exercise respiratory exchange ratio whereas most differences in glucose-insulin variables became non-significant after further adjustment for percent body fat. QFS familial data indicate that the heritability of NME reaches about 30%. In conclusion, the results of this study show that beyond aerobic fitness and physical activity-participation, mechanical efficiency is an additional activity-related variable that is independently associated with variations in body composition and glycemic profile.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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