THE FUSE

In fitness right now, “Zone 0” is having its moment. The idea sounds almost too good to be true: effortless, ultra-low-intensity movement that barely feels like exercise, yet still carries health benefits. Think of a leisurely stroll, light stretching, or puttering in the garden, the kinds of movements where your heart rate stays below 50% of its max, and you could comfortably chat the entire time.