Effect of age and gender on heart rate recovery after submaximal exercise during cardiac rehabilitation in patients with angina pectoris, recent acute myocardial infarction, or coronary bypass surgery.
ABSTRACT The effect of exercise training on the heart rate recovery (HRR) response to submaximal effort was examined in 81 patients during 12 weeks of phase II cardiac rehabilitation. Although HRR after submaximal effort was relatively reduced in older patients with heart disease and in women, its increase during exercise training in men and women of all ages was consistent with enhancement of parasympathetic tone during activities of daily living.
- SourceAvailable from: Michele Daniela Borges Santos Hiss[Show abstract] [Hide abstract]
ABSTRACT: INTRODUCTION: Physical therapy during phase I of cardiac rehabilitation (CPT) can be started 12 to 24 hours after acute myocardial infarction (AMI), however, it is common to extend the bed rest due to fear of patients instability. OBJECTIVES: To assess the hemodynamic and autonomic responses to post-AMI patients when subjected to first day of phase I protocol of CPT, as well as their safety. MATERIALS AND METHODS: We studied 51 patients with first uncomplicated AMI, 55 ± 11 years, 76% men. The patients were subjected to first day protocol phase I CPT, on average, 24 hours after AMI. The Instantaneous heart rate (HR) and RR interval were acquired by HR monitor (Polar™S810i) and blood pressure (BP) checked by auscultation. HR variability was analyzed in the time (RMSSD and RMSM-Ri in ms) and frequency domains. Power spectral density was expressed in absolute (ms2/Hz) and normalized (nu) units for the bands of low (LF) and high frequencies (HF) and as LF/HF ratio. RESULTS: The RMSSD, HF and HFnu have reduced performance of the exercises in relation to rest and post-exercise (p < 0.05), LFnu and LF/HF ratio increased (p < 0.05). HR and systolic BP showed an increase during the execution of the exercises in relation to rest (p < 0.05). There were no any signs and/or symptoms of exercise intolerance. CONCLUSION: The exercise was effective, because it caused changes hemodynamic and autonomic modulation in these patients, without causing any medical complications.Fisioterapia em Movimento. 03/2012; 25(1):153-163.
- [Show abstract] [Hide abstract]
ABSTRACT: Abstract Background: Abnormalities of autonomic function have been reported in patients with chronic obstructive pulmonary disease. The effect of the exercise training in heart rate recovery (HRR) has not been established in patients with COPD. Objective: To assess the effects of 8-weeks' endurance training program on parasympathetic nervous system response measured as heart rate recovery in a sample of moderate-to-severe COPD patients. Methods: We recruited a consecutive sample of patients with COPD candidates to participate in a pulmonary rehabilitation program from respiratory outpatient clinics of a tertiary hospital. HRR was calculated, before and after training, as the difference in heart rate between end-exercise and one minute thereafter (HRR1) in a constant-work rate protocol. Results: A total of 73 COPD patients were included: mean (SD) age 66 (8) years, median (P25-P75) post-bronchodilator FEV1 39 (29-53)%. The prevalence of slow HRR1 (≤12 beats) at baseline was 63%, and was associated with spirometric severity (mean FEV1 35% in slow HRR1 vs 53 in normal HRR1, p < 0.001). After 8-weeks training, HRR1 improved from mean (SD) 10 (7) to 12 (7) beats (p = 0.0127). Multivariate linear regression models showed that the only variable related to post-training HRR1 was pre-training HRR1 (p < 0.001). Conclusions: These results suggest that training enhances HRR in patients with moderate-to-severe COPD. HRR is an easy tool to evaluate ANS such that it may be a useful clinical marker of parasympathetic nervous system response in patients with COPD.COPD Journal of Chronic Obstructive Pulmonary Disease 01/2014; 11:190-196. · 2.73 Impact Factor
- [Show abstract] [Hide abstract]
ABSTRACT: We aimed to evaluate the utility of a submaximal heart rate recovery (HRR) test to monitor changes in cardiac fitness after aerobic training. Twenty healthy subjects were assigned to a control (n=10) or a training (n=10) group. Subjects in the training group performed 8 weeks of bicycle training, followed by 8 weeks of detraining. HRR was assessed after exercises at 65% and 80% HRmax. The HRR test was performed at weeks 0 (W0), 4 (W4), 8 (W8) and 16 (W16) in the training group and at W0 and W8 in the control group. HRR indices changed in response to training and detraining. Absolute HR recovery at 60, 120 and 180 seconds after exercise increased at both exercise intensities at W8 of training (p<0.01, W8 vs. W0), and returned to the pretraining level after detraining (p>0.05, W16 vs. W0). Time constants of fast HRR recovery (<1 min) changed with training (p<0.05-0.01, W8 vs. W0) and detraining (p>0.05, W16 vs. W0), but only at 65% HRmax. At the end of the 3-minute recovery period, the predicted HR value (A0) and the HR recovered (Amax) from the mono-exponential analysis changed with training (p<0.05-0.01 W8 vs. W0) and detraining (p>0.05. W16 vs. W0). We conclude that this novel submaximal HRR test is highly sensitive for monitoring cardiac fitness during training and detraining in healthy people. Since this test is simple, inexpensive, and the data are reliable and easy to analyze, we hope that it may be of interest to the sports science community.The Journal of Strength and Conditioning Research 09/2014; · 1.80 Impact Factor