Why do people with ME claim to know more about the medical aspects of their disease than their doctors? Because the mechanisms that usually ensure doctors' knowledge fail in the case of ME, and sick people have created mechanisms of knowledge production and dissemination to pick up the slack.

That sounds complicated, I'm just using a Garmin.

Thanks, I'll have a look at that.

Can anyone recommend an app to track heart rate over the course of a day? Ideally free, or at least not pricey.