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

Is heart rate variability a feasible method to determine anaerobic threshold in progressive resistance exercise in coronary artery disease?

Full text
Author(s):
Milena P. R. Sperling ; Rodrigo P. Simões [2] ; Flávia C. R. Caruso [3] ; Renata G. Mendes [4] ; Ross Arena [5] ; Audrey Borghi-Silva
Total Authors: 6
Document type: Journal article
Source: BRAZILIAN JOURNAL OF PHYSICAL THERAPY; v. 20, n. 4, p. 289-297, 2016-06-16.
Abstract

ABSTRACT Background Recent studies have shown that the magnitude of the metabolic and autonomic responses during progressive resistance exercise (PRE) is associated with the determination of the anaerobic threshold (AT). AT is an important parameter to determine intensity in dynamic exercise. Objectives To investigate the metabolic and cardiac autonomic responses during dynamic resistance exercise in patients with Coronary Artery Disease (CAD). Method Twenty men (age = 63±7 years) with CAD [Left Ventricular Ejection Fraction (LVEF) = 60±10%] underwent a PRE protocol on a leg press until maximal exertion. The protocol began at 10% of One Repetition Maximum Test (1-RM), with subsequent increases of 10% until maximal exhaustion. Heart Rate Variability (HRV) indices from Poincaré plots (SD1, SD2, SD1/SD2) and time domain (rMSSD and RMSM), and blood lactate were determined at rest and during PRE. Results Significant alterations in HRV and blood lactate were observed starting at 30% of 1-RM (p<0.05). Bland-Altman plots revealed a consistent agreement between blood lactate threshold (LT) and rMSSD threshold (rMSSDT) and between LT and SD1 threshold (SD1T). Relative values of 1-RM in all LT, rMSSDT and SD1T did not differ (29%±5 vs 28%±5 vs 29%±5 Kg, respectively). Conclusion HRV during PRE could be a feasible noninvasive method of determining AT in CAD patients to plan intensities during cardiac rehabilitation. (AU)

FAPESP's process: 09/01842-0 - Analysis of central and peripheral muscle metabolism and adjustments on dynamic versus resistance exercise in coronary arterial disease patients: effects of resistance physical training program based on anaerobic threshold by different methodologies
Grantee:Audrey Borghi Silva
Support Opportunities: Research Grants - Young Investigators Grants