Your pace is lying to you. Not maliciously — but on any given run, your watch is being shaped by the wind, the heat, how well you slept, how much you ate. Your pace is all of those variables stacked on top of each other. Heart rate is just you. It's your body telling you, in real time, how hard you're actually working. Train to heart rate and those external variables stop mattering in the way they used to. The effort is honest. The training benefit is real. This is where it all starts.

The Oura Ring 5 has just landed, so naturally I'm here to talk about the Ring 4 Ceramic — the model it replaces. Hear me out, because there's method in it. I've been living with the Ring 4 Ceramic (two of them, actually), and I'm not rushing out for the 5. Here's the honest, runner-and-coach's-eye view: what it's brilliant at, what it costs you, why the ceramic is a lovely nice-to-have — and why, if you already own a Ring 4, you can almost certainly skip the upgrade entirely.

Some runners just handle heat better than others — but nobody's helpless when the temperature climbs. From slowing down and dressing light to getting your electrolytes right and protecting your skin, here's how to train smart through a British summer (however much of one we actually get). It all comes back to one principle that runs through everything we do: run to effort, not pace. Get that into your head and a hot summer of running becomes something to enjoy, not endure.