Article Text
Abstract
Objectives We compared effects of shorter moderate-intensity exercise time (<10 min bouts) on cardiometabolic parameters with the current recommendations among elderly adults.
Methods Fifty-three sedentary individuals aged ≥50 years were divided into exercise groups1: male and2 female short-duration bouts (MS and FS, respectively), and3 male and4 female long-duration bouts (ML and FL, respectively). Short-duration bouts consisted three 5–10 min moderate-intensity jogging sessions daily, and long-duration bouts consisted 30–60 min sessions 3–5 days weekly. Cumulative exercise times were equivalent. Physical activity (PA) was measured by log and activity monitors. Fasting venous blood at baseline and 8 weekly intervals was used for blood chemistry.
Results After 24 weeks, MS and FS with total cholesterol (TC) of >5.2 mmol/L and >5.3 mmol/L decreased from 22.2% to 14.8% and from 30.9% to 11.5%, respectively. For ML, this decreased from 25.9% to 3.7%, while FL had 0% change. In MS and ML, TC/high-density lipoproteins (HDLs) of >5.0 mmol/L dropped from 22.2% to 7.4% and from 22.2% to 15.4%, respectively. In FS and FL, TC/HDL of >4.5 mmol/L declined from 19.2% to 7.7% and from 19.2% to 3.8%, respectively. MS and ML with fasting blood glucose of ≥5.5 mmol/L declined from 40.7% to 11.1% and from 33.3% to 3.7%, respectively. Similarly, it declined from 46.2% to 0% and 42.3% to 11.5% for FS and FL, respectively. There were no differences in the changes between regimes throughout the study.
Conclusion Bouts lasting <10 min per session are as good as those lasting ;≥30 min in improving cardiometabolic profiles of sedentary adults aged ≥50 years.
- exercise physiology
- glucose
- lipids
- non-communicable disease
- physical fitness
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Footnotes
Contributors KM helped in designing protocol, data collection, analysis and writing. Both KT and NBP helped with designing of protocol and writing the manuscript.
Funding This research was supported by the Consortium for Advanced Research Training in Africa (CARTA). CARTA is jointly led by the African Population and Health Research Center (APHRC) and the University of the Witwatersrand and funded by the Wellcome Trust (UK) (grant no: 087547/Z/08/Z), the Department for International Development (DfID) under the Development Partnerships in Higher Education (DelPHE), the Carnegie Corporation of New York (grant no: B 8606), the Ford Foundation (grant no: 1100–0399), Google.Org (grant no: 191994),Sida (grant no: 54100029), MacArthur Foundation (grant no:10-95915-000-INP) and British Council.
Competing interests None declared.
Patient consent Obtained.
Ethics approval The study was approved by the joint Moi Teaching and Referral Hospital and Moi University Research Ethics Committee in Eldoret, Kenya. Ethical approval number: MTRH-MU IREC 0001242.
Provenance and peer review Not commissioned; externally peer reviewed.