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Frandsen J, Hansen IMD, Wismann JF, Olsen MH, Brage-Andersen MR, Sahl RE, Hansen M, Ingersen A, Modvig JL, Schmücker M, Grauslund CH, Dela F, Larsen S, Helge JW. Maximal Fat Oxidation Rate Is Higher in Fit Women and Unfit Women With Obesity, Compared to Normal-weight Unfit Women. J Clin Endocrinol Metab 2021; 106:e4389-e4399. [PMID: 34185854 DOI: 10.1210/clinem/dgab473] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Indexed: 11/19/2022]
Abstract
CONTEXT The maximal fat oxidation rate (MFO) is higher in aerobically fit vs unfit young men, but this training-related increase in MFO is attenuated in middle-aged men. Further, it has also been found that unfit men with obesity may have an elevated MFO compared to unfit normal-weight men. OBJECTIVE Based hereupon, we aimed to investigate whether a fitness-related higher MFO were attenuated in middle-aged women compared to young women. Also, we aimed to investigate if unfit women with obesity have a higher MFO compared to unfit normal-weight women. We hypothesized that the training-related elevated MFO was attenuated in middle-aged women, but that unfit women with obesity would have an elevated MFO compared to unfit normal-weight women. METHODS We recruited 70 women stratified into 6 groups: young fit (n = 12), young unfit (n = 12) middle-aged fit (n = 12), middle-aged unfit (n = 12), unfit young women with obesity (n = 12), and unfit middle-aged women with obesity (n = 10). Body composition and resting blood samples were obtained and MFO was measured by a graded exercise test on a cycle ergometer via indirect calorimetry. Subsequently, a maximal exercise test was performed to establish peak oxygen uptake (V̇O2peak). RESULTS Young and middle-aged fit women had a higher MFO compared to age-matched unfit women, and young fit women had a higher MFO compared to fit middle-aged women. Unfit women with obesity, independent of age, had a higher MFO compared to their normal-weight and unfit counterparts. CONCLUSION The training-related increase in MFO seems maintained in middle-aged women, and we find that unfit women with obesity, independent of age, have a higher MFO compared to unfit normal-weight women.
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Affiliation(s)
- Jacob Frandsen
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Ida Marie Dahlgaard Hansen
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Julie Fensmark Wismann
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Maria Høyer Olsen
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Morten Runge Brage-Andersen
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Ronni Eg Sahl
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Maria Hansen
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Arthur Ingersen
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Johanne Louise Modvig
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Malte Schmücker
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Camilla Honoré Grauslund
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Flemming Dela
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
- Department of Geriatrics, Bispebjerg University Hospital, DK-2400 Copenhagen NV, Denmark
| | - Steen Larsen
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
- Clinical Research Centre, Medical University of Bialystok, PL-15-098 Bialystok, Poland
| | - Jørn Wulff Helge
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health, University of Copenhagen, DK-2200 Copenhagen N, Denmark
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