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Current literature lacks solid evidence on the improvement of heart rate variability (HRV) after exercise training in patients with COPD.We aimed to investigate changes in HRV after two exercise training programs in patients with COPD and to investigate the determinants of these eventual changes.Forty patients with COPD (FEV 1 39±13%pred) were randomized into high (n=20) or low (n=20) intensity...
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