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Paul Franks

Paul Franks

Principal investigator

Paul Franks

Physical activity, sedentary behaviors, and estimated insulin sensitivity and secretion in pregnant and non-pregnant women


  • Anna Gradmark
  • Jeremy Pomeroy
  • Frida Renström
  • Susanne Steiginga
  • Margareta Persson
  • Antony Wright
  • Les Bluck
  • Magnus Domellof
  • Steven E. Kahn
  • Ingrid Mogren
  • Paul Franks

Summary, in English

Background: Overweight and obesity during pregnancy raise the risk of gestational diabetes and birth complications. Lifestyle factors like physical activity may decrease these risks through beneficial effects on glucose homeostasis. Here we examined physical activity patterns and their relationships with measures of glucose homeostasis in late pregnancy compared to non-pregnant women. Methods: Normal weight and overweight women without diabetes (N = 108; aged 25-35 years) were studied; 35 were pregnant (in gestational weeks 28-32) and 73 were non-pregnant. Insulin sensitivity and beta-cell response were estimated from an oral glucose tolerance test. Physical activity was measured during 10-days of free-living using a combined heart rate sensor and accelerometer. Total (TEE), resting (REE), and physical activity (PAEE) energy expenditure were measured using doubly-labeled water and expired gas indirect calorimetry. Results: Total activity was associated with reduced first-phase insulin response in both pregnant (Regression r(2) = 0.11; Spearman r = -0.47; p = 0.007) and non-pregnant women (Regression r2 = 0.11 Spearman; r = -0.36; p = 0.002). Relative to non-pregnant women, pregnant women were estimated to have secreted 67% more insulin and had 10% lower fasting glucose than non-pregnant women. Pregnant women spent 13% more time sedentary, 71% less time in moderate-to-vigorous intensity activity, had 44% lower objectively measured total activity, and 12% lower PAEE than non-pregnant women. Correlations did not differ significantly for any comparison between physical activity subcomponents and measures of insulin sensitivity or secretion. Conclusions: Our findings suggest that physical activity conveys similar benefits on glucose homeostasis in pregnant and non-pregnant women, despite differences in subcomponents of physical activity.


  • Genetic and Molecular Epidemiology
  • EXODIAB: Excellence in Diabetes Research in Sweden
  • EpiHealth: Epidemiology for Health

Publishing year





BMC Pregnancy and Childbirth



Document type

Journal article


BioMed Central (BMC)


  • Obstetrics, Gynecology and Reproductive Medicine


  • pregnancy
  • physical activity
  • sedentary time
  • beta?beta?-cell response
  • insulin sensitivity



Research group

  • Genetic and Molecular Epidemiology


  • ISSN: 1471-2393