PMID- 27175565 OWN - NLM STAT- MEDLINE DCOM- 20170731 LR - 20180927 IS - 1537-7385 (Electronic) IS - 0894-9115 (Linking) VI - 96 IP - 1 DP - 2017 Jan TI - Comparison of Carbohydrate and Lipid Oxidation During Different High-Intensity Interval Exercise in Patients with Chronic Heart Failure. PG - 50-54 AB - Substrate oxidation was compared during different high-intensity intermittent exercise (HIIE) protocols in patients with heart failure and reduced ejection fraction (HFREF). Eighteen males with HFREF (58.8 +/- 9 years) were randomly assigned to 4 different HIIEs: 30 seconds (A and B) or 90 seconds (C and D) at 100% peak power output, with passive (A and C) or active recovery (50% of peak power output; B and D). Each HIIE protocol was separated by 1 week. Substrate oxidation (carbohydrate [CHO] and lipid: in g/min and in %) was calculated with gas exchange analysis. A 2-way analysis of variance and Bonferroni post hoc test were used (P