I really enjoy running and have taken part in numerous runs and triathlons over the last 15 years. Earlier this year I have really struggled with running and found it a chore due to muscle and joint pain which I attributed to getting old. However having been admitted to hospital earlier this year blood tests revealed that I have an under active thyroid and symptoms include tiredness as well as muscle aches and cramps. I have started treatment and the problems with my muscles seem to be reducing. I'm still napping most afternoons but that could be because I'm getting old now :-). Mark O'Flynn