Multiple short bouts of exercise are better than a single continuous bout for cardiometabolic health: a randomised cross
- PDF / 743,013 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 48 Downloads / 148 Views
ORIGINAL ARTICLE
Multiple short bouts of exercise are better than a single continuous bout for cardiometabolic health: a randomised crossover trial Philip Shambrook1 · Michael I. Kingsley1,2 · Nicholas F. Taylor3 · Daniel W. Wundersitz1 · Claire E. Wundersitz4 · Brett A. Gordon1 Received: 27 April 2020 / Accepted: 4 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose To compare cardiometabolic responses to five consecutive days of daily postprandial exercise accumulated in three 10-min bouts or a single 30-min bout to a no-exercise control. Methods Ten insufficiently active adults completed three trials in a randomised order. Each trial comprised five consecutive days of 30 min of exercise either accumulated in three separate 10-min bouts (ACC) after main meals; a single 30-min bout after dinner (CONT); or a no-exercise control (NOEX). Glucose regulation was assessed from an oral glucose tolerance test. Applanation tonometry was used to assess pulse wave velocity approximately 12 h following completion of the final trial. Results Area under the 2-h glucose curve was similar for CONT (mean; 95% CI 917 mmol L−1 2 h−1; 815 to 1019) and ACC (931 mmol L−1 2 h−1; 794 to 1068, p = 0.671). Area under the 2-h insulin curve was greater following NOEX (70,328 pmol L−1 2 h−1; 30,962 to 109,693) than ACC (51,313 pmol L−1 2 h−1: 21,822 to 80,806, p = 0.007). Pulse wave velocity was lower for ACC (5.96 m s−1: 5.38 to 6.53) compared to CONT (6.93 m s−1: 5.92 to 7.94, p = 0.031) but not significantly lower for ACC compared to NOEX (6.52 m s−1: 5.70 to 7.34, p = 0.151). Conclusion Accumulating 30 min of moderate-intensity walking in three bouts throughout the day is more effective at reducing markers of cardiometabolic health risk in insufficiently active, apparently healthy adults than a single daily bout. Both accumulated and single-bout walking were equally as effective at reducing postprandial glucose concentrations compared to a no-exercise control. Therefore, accumulating exercise in short bouts after each main meal might be more advantageous for overall cardiometabolic health. Keywords Glycaemic regulation · Physical activity · Accumulated exercise · Vascular compliance · Postprandial · Insulin Abbreviations ACC Accumulated exercise ANOVA Analysis of variance AUC Area under the curve Communicated by Philip D. Chilibeck. * Brett A. Gordon [email protected] 1
Holsworth Research Initiative, La Trobe Rural Health School, La Trobe University, P.O. Box 199, Bendigo, VIC 3552, Australia
2
Department of Exercise Sciences, Faculty of Science, University of Auckland, Auckland, New Zealand
3
School of Allied Health, Human Services and Sport, La Trobe University, Bundoora, Australia
4
Angliss Hospital Community Rehabilitation Programme, Eastern Health, Melbourne, Australia
CAVI Cardio-ankle vascular index CONT Continuous exercise ECG Electrocardiograph HbA1c Glycated haemoglobin Hg Mercury HRR Heart rate reserve HRV Heart rate variability MD Mean
Data Loading...
