The effects of HIIT appear to be comparable to those of continuous exercise in relation to functional and cardiovascular responses .
OBJECTIVE To evaluate the effects of high-intensity interval training ( HIIT ) , in comparison with those of continuous exercise , on functional capacity and cardiovascular variables in patients with COPD , through a systematic review and meta- analysis of r and omized controlled trials .
Aerobic Exercise Training Improves Right- and Left Ventricular Systolic Function in Patients with COPD
Abstract Objective : The aim of this study was to investigate the effects of moderate continuous training ( MCT ) and high intensity aerobic interval training ( AIT ) on systolic ventricular function and aerobic capacity in COPD patients . Methods : Seventeen patients with COPD ( 64 ± 8 years , 12 men ) with FEV1 of 52.8 ± 11 % of predicted , were r and omly assigned to isocaloric programs of MCT at 70 % of max heart rate ( HR ) for 47 minutes ) or AIT ( ∼90 % of max HR for 4 × 4 minutes ) three times per week for 10 weeks . Baseline cardiac function was compared with 17 age- and sex-matched healthy individuals . Peak oxygen uptake ( VO2-peak ) and left ( LV ) and right ventricular ( RV ) function examined by echocardiography , were measured at baseline and after 10 weeks of training . Results : At baseline , the COPD patients had reduced systolic function compared to healthy controls ( p < 0.05 ) . After the training , AIT and MCT  increased VO2-peak by 8 % and 9 % and work economy by 7 % and 10 % , respectively ( all p < 0.05 ) . LV and RV systolic function both improved ( p < 0.05 ) , with no difference between the groups after the two modes of exercise training . Stroke volume increased by 17 % and 20 % , LV systolic tissue Doppler velocity ( S ’ ) by 18 % and 17 % and RV S ’ by 15 % after AIT and MCT , respectively ( p < 0.05 ) . Conclusion : Systolic cardiac function is reduced in COPD . Both AIT and MCT  improved systolic cardiac function . In contrast to other patient groups studied , higher exercise intensity does not seem to have additional effects on cardiac function or aerobic capacity in COPD patients
The effects of HIIT appear to be comparable to those of continuous exercise in relation to functional and cardiovascular responses .
OBJECTIVE To evaluate the effects of high-intensity interval training ( HIIT ) , in comparison with those of continuous exercise , on functional capacity and cardiovascular variables in patients with COPD , through a systematic review and meta- analysis of r and omized controlled trials .