Metabolic, hemodynamic and structural adjustments to low intensity exercise training in a metabolic syndrome model
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Citações na Scopus
22
Tipo de produção
article
Data de publicação
2013
Título da Revista
ISSN da Revista
Título do Volume
Editora
BIOMED CENTRAL LTD
Autores
MORVAN, Eduardo
LIMA, Nathalia Edviges Alves
ANGELIS, Katia De
WICHI, Rogerio Brandao
RODRIGUES, Bruno
MAIFRINO, Laura Beatriz Mesiano
Citação
CARDIOVASCULAR DIABETOLOGY, v.12, article ID 89, 10p, 2013
Resumo
Background: The increase in fructose consumption is paralleled by a higher incidence of metabolic syndrome, and consequently, cardiovascular disease mortality. We examined the effects of 8 weeks of low intensity exercise training (LET) on metabolic, hemodynamic, ventricular and vascular morphological changes induced by fructose drinking in male rats. Methods: Male Wistar rats were divided into (n = 8 each) control (C), sedentary fructose (F) and ET fructose (FT) groups. Fructose-drinking rats received D-fructose (100 g/l). FT rats were assigned to a treadmill training protocol at low intensity (30% of maximal running speed) during 1 h/day, 5 days/week for 8 weeks. Measurements of triglyceride concentrations, white adipose tissue (WAT) and glycemia were carried out together with insulin tolerance test to evaluate metabolic profile. Arterial pressure (AP) signals were directly recorded. Baroreflex sensitivity (BS) was evaluated by the tachycardic and bradycardic responses. Right atria, left ventricle (LV) and ascending aorta were prepared to morphoquantitative analysis. Results: LET reduced WAT (-37.7%), triglyceride levels (-33%), systolic AP (-6%), heart weight/body weight (-20.5%), LV (-36%) and aortic (-76%) collagen fibers, aortic intima-media thickness and circumferential wall tension in FT when compared to F rats. Additionally, FT group presented improve of BS, numerical density of atrial natriuretic peptide granules (+42%) and LV capillaries (+25%), as well as the number of elastic lamellae in aorta compared with F group. Conclusions: Our data suggest that LET, a widely recommended practice, seems to be particularly effective for preventing metabolic, hemodynamic and morphological disorders triggered by MS.
Palavras-chave
Fructose, Exercise training, Triglycerides, Baroreflex sensitivity, Cardiovascular remodeling, Aorta remodeling
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