If the thought of getting in better shape by exercising less sounds too good to be true, this issue we explore legendary bodybuilder Mike Mentzer’s ‘High-Intensity Training’ (HIT) method: focused on short, intense workouts for maximum muscle growth. Elsewhere we step back in time to Ancient Rome; ask a HYROX world record holder how to train for your first event; and rustle up some endurance recipes to keep you stronger for longer.