Does physical activity equally predict gain in fat mass among obese and nonobese young adults?

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Does physical activity equally predict gain in fat mass among obese and nonobese young adults?

Ekelund, Ulf, 1960- (författare): Medical Research Council Epidemiology Unit, Cambridge, UK; Department of Physical Education and Health, Örebro University, Örebro, Sweden

Särnblad, Stefan, 1963- (författare): Örebro universitet,Institutionen för läkarutbildning,Department of Paediatrics, Örebro University Hospital, Örebro, Sweden

Brage, Sören (författare): Medical Research Council Epidemiology Unit, Cambridge, UK

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Ryberg, John (författare): Department of Paediatrics, Örebro University Hospital, Örebro, Sweden

Wareham, Nicholas J. (författare): Medical Research Council Epidemiology Unit, Cambridge, UK

Åman, Jan, 1948- (författare): Department of Paediatrics, Örebro University Hospital, Örebro, Sweden

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(creator_code:org_t)

2006-05-02
2007
Engelska.
Ingår i: International Journal of Obesity. - : Springer Science and Business Media LLC. - 0307-0565 .- 1476-5497. ; 31:1, s. 65-71

Relaterad länk:: https://www.nature.c...; visa fler...; https://urn.kb.se/re...; https://doi.org/10.1...; visa färre...

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Abstract Ämnesord

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BACKGROUND: Differences in energy metabolism and physical activity (PA) may contribute to the long-term regulation of body weight (BW).OBJECTIVE: To examine the associations between metabolic determinants, energy expenditure and objectively measured components of PA with change in BW and fat mass (FM). DESIGN: Prospective (4 years.), case-control study in obese (n=13) and normal weight (n=15) young adults.MEASUREMENTS: At baseline, we measured resting metabolic rate, substrate oxidation, movement economy (ml O(2) kg(-1) min(-1)), aerobic fitness (VO(2max)), total and PA energy expenditure by doubly labelled water, and PA by accelerometry. Fat mass was measured by DXA. At follow-up we repeated our measurements of PA and FM.RESULTS: Fat mass increased significantly (P<0.001) in both groups. Physical activity did not change between baseline and 'follow up'. Change in overall PA (counts per minute) was inversely associated with change in BW and (beta=-0.0124, P=0.054) and FM (beta=-0.008, P=0.04). Post hoc analyses suggested that this association was explained by changes in the normal weight group only (beta=-0.01; P=0.008; and beta=-0.0097; P=0.009, for BW and FM, respectively). Metabolic determinants, energy expenditure estimates and subcomponents of PA (i.e. time spent at different intensity levels) were not significantly associated with change in BW or FM.CONCLUSION: Our results suggest an independent association between PA and FM. However, this association may differ depending on obesity status. The gain in FM, without any change in PA, may suggest that dietary intake is the major contributor to the positive energy balance.

Ämnesord

SAMHÄLLSVETENSKAP -- Annan samhällsvetenskap -- Tvärvetenskapliga studier inom samhällsvetenskap (hsv//swe)
SOCIAL SCIENCES -- Other Social Sciences -- Social Sciences Interdisciplinary (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)

Nyckelord

exercise
energy balance
energy expenditure
weight gain
INTERDISCIPLINARY RESEARCH AREAS
TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN
Sports
Idrott
MEDICINE
MEDICIN
Sports Science
Idrottsvetenskap

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Av författaren/redakt...: Ekelund, Ulf, 19 ...; Särnblad, Stefan ...; Brage, Sören; Ryberg, John; Wareham, Nichola ...; Åman, Jan, 1948-

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SAMHÄLLSVETENSKAP: SAMHÄLLSVETENSKA ...; och Annan samhällsve ...; och Tvärvetenskaplig ...

MEDICIN OCH HÄLSOVETENSKAP: MEDICIN OCH HÄLS ...; och Hälsovetenskap; och Idrottsvetenskap

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Av lärosätet: Örebro universitet

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