Pattyn N, et al. - A previous meta-analysis including nine trials comparing aerobic interval training with aerobic continuous training in patients with coronary artery disease suggested a significant difference in peak oxygen uptake favoring aerobic interval training. Researchers here aimed at updating the original meta-analysis focussing on peak oxygen uptake and evaluating the effect on secondary outcomes. It was noted that compared with aerobic continuous training, aerobic interval training led to a higher increase in peak oxygen uptake in all patients, and in the subgroups of patients with coronary artery disease and patients with chronic heart failure with reduced ejection fraction. Moreover, after aerobic interval training, all patients showed larger increase of the first ventilatory threshold and peak heart rate.