Table 3. Recommendations on HIIT Protocol for Heart Failure (HF) and Coronary Artery Disease (CAD) Patients [38]

Disease	Frequency, d/wk	Duration program, wks	Session duration, min	Intensity of recovery, peak VO2, %	Ratio, work/recovery
HF	≥ 3 (2-5)	≥ 6 (6-24)	30-60 (28-60)	≥ 40% (40-70%)	≥ 1.33 (0.66-1.33)
CAD	≥ 2 (2-5)	≥ 6 (4-52)	30-60 (28-60)	≥ 40% (0-70%)	≥ 1 (0.5-1.33)

CAD: coronary artery disease, HF: heart failure, HIIT: high-intensity interval training, peak VO2: peak oxygen uptake