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The association of intensity and overall level of physical activity energy expenditure with a marker of insulin resistance.

ABSTRACT: Physical activity is important in preventing insulin resistance, but it is unclear which dimension of activity confers this benefit. We examined the association of overall level and intensity of physical activity with fasting insulin level, a marker of insulin resistance.This was a cross-sectional analysis of the Medical Research Council Ely population-based cohort study (2000--2002). Physical activity energy expenditure (PAEE) in kJ kg(-1) min(-1) was measured by heart rate monitoring with individual calibration over a period of 4 days. The percentage of time spent above 1.5, 1.75 and 2 times resting heart rate (RHR) represented all light-to-vigorous, moderate-to-vigorous and vigorous activity, respectively.Data from a total of 643 non-diabetic individuals (319 men, 324 women) aged 50 to 75 years were analysed. In multivariate linear regression analyses, adjusting for age, sex and body fat percentage, PAEE was significantly associated with fasting insulin (pmol/l) (beta = -0.875, p = 0.006). Time (% of total) spent above 1.75 x RHR and also time spent above 2 x RHR were both significantly associated with fasting insulin (beta = -0.0109, p = 0.007 and beta = -0.0365, p = 0.001 respectively), after adjusting for PAEE, age, sex and body fat percentage. Time spent above 1.5 x RHR was not significantly associated with fasting insulin in a similar model (beta = -0.0026, p = 0.137).The association between PAEE and fasting insulin level, a marker of insulin resistance, may be attributable to the time spent in moderate-to-vigorous and vigorous activity, but not to time spent in light-intensity physical activity.

SUBMITTER: Assah FK

PROVIDER: S-EPMC2491413 | biostudies-other | 2008 Aug

REPOSITORIES: biostudies-other

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Energy Expenditure and Intensity of Classroom Physical Activity in Elementary School Children.

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| S-EPMC7520703 | biostudies-literature

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| S-EPMC2931398 | biostudies-literature

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Truncation of Pik3r1 Causes Severe Insulin Resistance Uncoupled From Obesity and Dyslipidaemia by Increased Energy Expenditure

Project description:Both PIK3R1(Y657X) mutant and wild-type C57Bl/6J mice were maintained on chow until 16 weeks old, at which time they were fasted for 16 hours and then refed chow for 6 hours. The tissues were harvested and snap-frozen at three time points: chow diet before overnight fast (ad libitum chow, ALC), after 16 hour fast (overnight fast, ONF), and after 6 hour refeeding (refed 6 hours, RF6).

2020-06-30 | GSE153431 | GEO

Energy Expenditure and Intensity of Group-Based High-Intensity Functional Training: A Brief Report.

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2020-07-23 | GSE134846 | GEO

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| S-EPMC2836069 | biostudies-literature

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