There have been several posts on other threads where pwME have mentioned particular ways they use to measure their state of health. Some of these may be useful in enabling us to gauge whether we are well enough to do stuff or need to rest more, and to predict crashes and adjust our activity levels accordingly. Those I've come across include: heart rate monitoring - both resting heart rate and anerobic threshold. heart rate variability steps blood pressure. Other thinks we might try to measure include: sleep - duration and quality. cognitive function biochemical - urine, sweat, saliva, blood eg cortisol, sugar levels. Please do share what monitoring you do or would like to do, what equipment is needed, what it tells you, whether you find it useful, and in what way. My aim is partly to encourage and enable those of us interested in doing so to monitor our health and symptoms in ways that enable better understanding of what affects us, and possibly to contribute useful information to our communication with our doctors, and to research. Note - this thead is in the public area of the forum, so only share stuff you're happy to have made public anywhere on the internet.