Low intensity resistance training improves systolic function and cardiovascular autonomic control in diabetic rats

Author(s)

Mostarda, Cristiano T. ^[1] ; Rodrigues, Bruno ^[2] ; de Moraes, Oscar Albuquerque ^{[1, 3]} ; Moraes-Silva, Ivana C. ^[1] ; Olinto Arruda, Paula Barros ^[1] ; Cardoso, Ruymar ^[1] ; Scapini, Katia Bilhar ^[1] ; dos Santos, Fernando ^[1] ; De Angelis, Katia ^[3] ; Irigoyen, Maria Claudia ^[1]

Affiliation

^[1] Univ Sao Paulo, Sch Med, Heart Inst InCor, Hypertens Unit, BR-05403000 Sao Paulo - Brazil

^[2] Univ Sao Judas Tadeu UST, Human Movement Lab, Sao Paulo - Brazil

^[3] Univ Nove Julho UNINOVE, Translat Physiol Lab, Sao Paulo - Brazil

• Document type: Journal article
• Source: JOURNAL OF DIABETES AND ITS COMPLICATIONS; v. 28, n. 3, p. 273-278, MAY-JUN 2014.
• Web of Science Citations: 9

Abstract

Aims: We evaluated the effects of low intensity resistance training (RT) on left ventricular (LV) function, baroreflex sensitivity (BRS), and cardiovascular autonomic control of streptozotocin-induced diabetic rats. Methods: Male Wistar rats were divided into (n = 8 each group): sedentary control (SC), trained control (TC), sedentary diabetic (SD), and trained diabetic (TD). Trained groups underwent low intensity RT (40%-50% 1 repetition maximum) for 10 weeks. Echocardiographic evaluation, arterial pressure (AP), heart rate (HR), BRS, and autonomic measurements were performed. Results: Diabetes induced an increase in glycemia and a reduction in body weight in diabetics when compared with control animals. Diabetic rats displayed cardiac dysfunction, reduced systolic AP and HR, impaired BRS and autonomic derangement when compared to control rats. RT improved ejection fraction (SD: 68% +/- 1.3% vs. TD: 75% +/- 3.0%) and velocity of circumferential fiber shortening (SD: 0.32 +/- 0.02 vs. TD: 0.40 +/- 0.01 circ/seg.10(-4)). Trained diabetic rats presented increased AP (+10.2%), HR (+10.4%), and BRS after RT protocol. Conclusions: Low intensity RT induced an increase in systolic function in diabetic rats. This may be due to positive LV remodeling and BRS improvement, which may have played an important role in the attenuation of hemodynamic impairment and cardiac autonomic neuropathy in streptozotocin-diabetic rats. (C) 2014 Elsevier Inc. All rights reserved. (AU)

• FAPESP's process: 12/20141-5 - Effects of aerobic,resistance or combined exercise training in experimental models of cardiometabolic disorders associated with ovarian hormone deprivation
• Grantee: Kátia de Angelis Lobo D Avila
• Support Opportunities: Regular Research Grants
• FAPESP's process: 07/58942-0 - From the bench to clinical trials: development of biomarkers as response predictors to therapy and target organs damage in systemic arterial hypertension
• Grantee: Eduardo Moacyr Krieger
• Support Opportunities: Research Projects - Thematic Grants