Abstract
BACKGROUND
Increased blood pressure (BP) in type 2 diabetes (T2DM) markedly increases cardiovascular disease morbidity and mortality risk compared to having increased BP alone.
OBJECTIVE
To investigate whether exercise reduces suboptimal levels of untreated suboptimal BP or treated hypertension.
DESIGN
Prospective, randomized controlled trial for 6 months.
SETTING
Single center in Baltimore, MD, USA.
PATIENTS
140 participants with T2DM not requiring insulin and untreated SBP of 120–159 or DBP of 85–99 mmHg, or, if being treated for hypertension, any SBP <159 mmHg or DBP < 99 mmHg; 114 completed the study.
INTERVENTION
Supervised exercise, 3 times per week for 6 months compared with general advice about physical activity.
MEASUREMENTS
Resting SBP and DBP (primary outcome); diabetes status, arterial stiffness assessed as carotid-femoral pulse-wave velocity (PWV), body composition and fitness (secondary outcomes).
RESULTS
Overall baseline BP was 126.8 ± 13.5 / 71.7 ± 9.0 mmHg, with no group differences. At 6 months, BP was unchanged from baseline in either group, BP 125.8 ± 13.2 / 70.7 ± 8.8 mmHg in controls; and 126.0 ± 14.2 / 70.3 ± 9.0 mmHg in exercisers, despite attaining a training effects as evidenced by increased aerobic and strength fitness and lean mass and reduced fat mass (all p < 0.05), Overall baseline PWV was 959.9 ± 333.1 cm/s, with no group difference. At 6-months, PWV did not change and was not different between group; exercisers, 923.7 ± 319.8 cm/s, 905.5 ± 344.7, controls.
LIMITATIONS
A completion rate of 81 %.
CONCLUSIONS
Though exercisers improve fitness and body composition, there were no reductions in BP. The lack of change in arterial stiffness suggests a resistance to exercise-induced BP reduction in persons with T2DM.
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Acknowledgements
Funding Support
This study was supported by grant R01DK62368 from the National Institute of Diabetes and Digestive and Kidney Diseases (Dr. Stewart); and by Grant Number UL1 RR 025005 from the National Center for Research Resources (NCRR), a component of the National Institutes of Health (NIH), and NIH Roadmap for Medical Research. Its contents are solely the responsibility of the authors and do not necessarily represent the official view of NCRR or NIH. Information on NCRR is available at http://www.ncrr.nih.gov/. Information on Re-engineering the Clinical Research Enterprise can be obtained from http://nihroadmap.nih.gov/clinicalresearch/overview-translational.asp."
Prior Presentations
American Heart Association Annual Meeting 2011, Orlando FL.
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The authors declare that they do not have a conflict of interest.
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Trials Registration clinicaltrials.gov Identifier: NCT00212303
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Dobrosielski, D.A., Gibbs, B.B., Ouyang, P. et al. Effect of Exercise on Blood Pressure in Type 2 Diabetes: A Randomized Controlled Trial. J GEN INTERN MED 27, 1453–1459 (2012). https://doi.org/10.1007/s11606-012-2103-8
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DOI: https://doi.org/10.1007/s11606-012-2103-8