Cost-effectiveness of High-Intensity Interval Training (HIIT) vs Moderate Intensity Steady-State (MISS) Training in UK Cardiac Rehabilitation

•In a recent randomized controlled trial, high-intensity interval exercise training (HIIT) was more effective than moderate intensity steady-state (MISS) exercise training for improving cardiorespiratory fitness in people with coronary artery disease attending cardiac rehabilitation. HIIT was also safe and well tolerated. We conducted a secondary health economic analysis to find out if HIIT or MISS exercise training was more cost-effective.•HIIT participants reported slightly higher health service use costs than MISS participants at 12 months.•HIIT participants reported greater gains in quality of life at 12 months.•HIIT was cost effective compared with MISS.