Structured, aerobic exercise reduces fat mass and is partially compensated through energy intake but not energy expenditure in women

MYERS, Anna, DALTON, Michelle, GIBBONS, Catherine, FINLAYSON, Graham and BLUNDELL, John (2019). Structured, aerobic exercise reduces fat mass and is partially compensated through energy intake but not energy expenditure in women. Physiology & Behavior, 199, 56-65.

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Link to published version:: https://doi.org/10.1016/j.physbeh.2018.11.005
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    Abstract

    Background Exercise-induced weight loss is often less than expected and highly variable in men and women. Behavioural compensation for the exercise-induced energy deficit could be through energy intake (EI), non-exercise physical activity (NEPA) or sedentary behaviour (SB). We investigated this issue in women. Methods Twenty-four overweight [body mass index (BMI) M = 27.9 kg/m2, SD = 2.7] women [age M = 33.1 years, SD = 11.7] completed 12-weeks of supervised exercise (5×500kcal per week) in a non-randomised pre-post intervention study. Body mass (BM), waist circumference (WC), body composition, resting metabolic rate (RMR), total daily EI, individual meals, appetite sensations and appetite-related peptides were measured at baseline (week 0) and post-intervention (week 12). Free-living physical activity (PA) and SB were measured (SenseWear) at baseline, week 1 and 10 of the exercise intervention, and at post-intervention (week 13). Results Following the 12-week exercise intervention BM [p = .04], BMI [p = .035], WC [p < .001] and fat mass [p = .003] were significantly reduced, and fat-free mass (FFM) significantly increased [p = .003]. Total [p = .028], ad libitum [p = .03] and snack box EI [p = .048] were significantly increased and this was accompanied by an increase in hunger [p = .01] and a decrease in fullness [p = .03] before meals. The peptides did not explain changes in appetite [p > .05]. There was no compensatory reduction in NEPA [p > .05] and no increase in SB, rather there was a decrease in SB during the exercise intervention [p = .03]. Conclusions Twelve-weeks of supervised aerobic exercise resulted in a significant reduction in FM and an increase in FFM. Exercise increased hunger and EI which only partially compensated for the increase in energy expenditure. There was no evidence for a compensatory reduction in NEPA or an increase in SB. Dietary intervention, as an adjunct to exercise, may offset the compensatory increase in EI and result in a greater reduction in BM.

    Item Type: Article
    Uncontrolled Keywords: 06 Biological Sciences; 11 Medical And Health Sciences; 17 Psychology And Cognitive Sciences; Behavioral Science & Comparative Psychology
    Identification Number: https://doi.org/10.1016/j.physbeh.2018.11.005
    Page Range: 56-65
    SWORD Depositor: Symplectic Elements
    Depositing User: Symplectic Elements
    Date Deposited: 12 Nov 2018 14:52
    Last Modified: 18 Mar 2021 03:20
    URI: http://shura.shu.ac.uk/id/eprint/23247

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