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The impact of exercise frequency upon microvascular endothelium function and oxidative stress among patients with coronary artery disease
Author(s) -
Borges Juliana P.,
Nascimento Alessandro R.,
Lopes Gabriella O.,
MedeirosLima Daniel J. M.,
Coelho Marina P.,
Nascimento Pablo M. C.,
Kopiler Daniel A.,
Matsuura Cristiane,
Mediano Mauro Felippe F.,
Tibirica Eduardo
Publication year - 2018
Publication title -
clinical physiology and functional imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.608
H-Index - 67
eISSN - 1475-097X
pISSN - 1475-0961
DOI - 10.1111/cpf.12492
Subject(s) - medicine , coronary artery disease , cardiology , oxidative stress , endothelium , aerobic exercise , vasodilation , endothelial dysfunction , cardiac function curve , heart failure
Summary Purpose This study compared the effects of low and high weekly exercise frequencies on microvascular endothelium function and oxidative stress among patients with coronary artery disease. Methods Thirty‐four male patients completed a 6‐month cardiac rehabilitation programme, from which 23 performed exercise with a high frequency (HF) and 11 with a low frequency (LF). Systemic microvascular blood flow, maximal aerobic capacity, blood lipids, oxidative stress and anthropometric data were assessed prior to and after the cardiac rehabilitation programme. Microvascular blood flow was assessed in the skin of the forearm using laser speckle contrast imaging coupled with iontophoresis of acetylcholine. Results Maximal aerobic capacity, biochemical analysis and anthropometric data were similar between groups prior to and after the cardiac rehabilitation programme ( P >0·05). However, after 6 months of cardiac rehabilitation performed with HF, there was an increase in the peak response to acetylcholine compared with LF (83·5 ± 58·5 versus 21·8 ± 22·4%; P< 0·05). Changes in lipid peroxidation (HF: −5·5 ± 9·4 versus LF: 2·2 ± 12·0 pmol MDA mg −1 ; P = 0·19), catalase activity (HF: 0·07 ± 0·17 versus LF: 0·04 ± 0·08 U mg −1 ; P = 0·74) and nitric oxide levels (HF: 1·8 ± 15·3 versus LF: −3·2 ± 12·3 μM; P = 0·36) were similar between groups after cardiac rehabilitation. Conclusion Six months of aerobic exercise training performed with high frequency is preferable to low frequency aiming endothelium microvascular function increases in patients with coronary artery disease. The mechanisms involved in this response are unclear and warrant additional research.