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Swimming training increases cardiac vagal activity and induces cardiac hypertrophy in rats BJMBR
Medeiros,A.; Oliveira,E.M.; Gianolla,R.; Casarini,D.E.; Negrão,C.E.; Brum,P.C..
The effect of swimming training (ST) on vagal and sympathetic cardiac effects was investigated in sedentary (S, N = 12) and trained (T, N = 12) male Wistar rats (200-220 g). ST consisted of 60-min swimming sessions 5 days/week for 8 weeks, with a 5% body weight load attached to the tail. The effect of the autonomic nervous system in generating training-induced resting bradycardia (RB) was examined indirectly after cardiac muscarinic and adrenergic receptor blockade. Cardiac hypertrophy was evaluated by cardiac weight and myocyte morphometry. Plasma catecholamine concentrations and citrate synthase activity in soleus muscle were also determined in both groups. Resting heart rate was significantly reduced in T rats (355 ± 16 vs 330 ± 20 bpm). RB was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Swimming-training exercise; Cardiac autonomic balance; Hemodynamics; Hypertrophic effect; Parasympathetic system; Resting bradycardia.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001200018
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