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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Post-Exercise Neurovascular Control in Chronic Heart Failure Patients

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Author(s):
Nobre, T. S. ; Groehs, R. V. ; Azevedo, L. F. ; Antunes-Correa, L. M. ; Martinez, D. G. ; Alves, M. J. N. N. ; Negrao, C. E.
Total Authors: 7
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF SPORTS MEDICINE; v. 37, n. 13, p. 1073-1079, DEC 2016.
Web of Science Citations: 1
Abstract

It remains unknown whether or not a reduction in muscle sympathetic nerve activity in heart failure patients is associated over time with the effects of long- or short-term repeated exercise. 10 chronic heart failure patients, age 49 +/- 3 years old, functional class I-III NYHA, ejection fraction <40% were randomly submitted to either an acute bout of moderate continuous exercise OR high-intensity interval exercise. Muscle sympathetic nerve activity (microneurography) and forearm blood flow (venous occlusion plethysmography) were evaluated pre- and post-exercise sessions. The moderate exercise consisted of cycle exercise at an intensity corresponding to anaerobic threshold. The interval exercise consisted of a 2-min cycle exercise at intensity corresponding to anaerobic threshold, followed by a 1-min exercise set at respiratory compensation point. Exercise capacity was evaluated by cardiopulmonary exercise test. The caloric expenditure in both sessions was 100kcal. Baseline muscle sympathetic nerve activity and forearm blood flow levels were not different between sessions. Moderate or high-intensity exercise caused no significant changes in muscle sympathetic nerve activity and forearm blood flow. These findings suggest that the reduction in muscle sympathetic nerve activity and the increase in forearm blood flow provoked by exercise training in chronic heart failure patients are due to cumulative effects over time. (AU)

FAPESP's process: 10/50048-1 - Cellular and functional bases of exercise in cardiovascular diseases
Grantee:Carlos Eduardo Negrão
Support type: Research Projects - Thematic Grants