de Moraes R, Van Bavel D, Gomes MDB, Tibiriçá E. Effects of non-supervised low intensity aerobic excise training on the microvascular endothelial function of patients with type 1 diabetes: a non-pharmacological interventional study.
BMC Cardiovasc Disord 2016;
16:23. [PMID:
26817606 PMCID:
PMC4728937 DOI:
10.1186/s12872-016-0191-9]
[Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 01/08/2016] [Indexed: 02/08/2023] Open
Abstract
Background
The aim of the present study was to evaluate changes in microvascular density and reactivity in patients with type 1 diabetes (T1D) resulting from low intensity chronic exercise training.
Methods
This study included 22 (34 ± 7 years) consecutive outpatients with T1D and disease duration > 6 years. We used intravital video-microscopy to measure basal skin capillary density and capillary recruitment using post-occlusive reactive hyperemia (PORH) in the dorsum of the fingers. Endothelium-dependent and -independent vasodilation of the skin microcirculation was evaluated in the forearm with a laser Doppler flow monitoring (LDF) system in combination with acetylcholine and sodium nitroprusside iontophoresis, PORH and local thermal hyperemia.
Results
The basal mean capillary density (MCD) after exercise training was significantly higher than before exercise (134 ± 25 vs. 119 ± 19 capillaries/mm2, respectively; P = 0.0013). MCD during PORH was also higher after exercise (140 ± 26 vs. 121 ± 24 capillaries/mm2, respectively; P < 0.0001). Endothelium-dependent capillary recruitment during PORH was also significantly higher after exercise (140 ± 26 vs. 134 ± 25 capillaries/mm2, respectively; P < 0.0012). There were no significant changes in skin microvascular reactivity after exercise as investigated using LDF.
Conclusions
Our results showed that low intensity aerobic exercise, performed four times per week for 12 weeks by patients with T1D, induces significant increases in microvascular density and endothelial-dependent capillary reactivity.
Trial registration
ClinicalTrials.gov NCT02441504. Registered 7 May 2015.
Electronic supplementary material
The online version of this article (doi:10.1186/s12872-016-0191-9) contains supplementary material, which is available to authorized users.
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