Im a 47 year old ex smoker who has decided to try for the London triathlon next year. I can cycle no problem but have just been for a run and thought I was finished for sure - after 6 minutes! On top of that I've been told that as I am 16 stone (sod metric!) I will damage my ankes or drop dead. I am tall so only a stone over weight but could do with some advice from anyone near Romford who knows about this stuff - any beginers who want to run round this way - anyone who knows about heart rates - in fact if you are into swimming or mountain bikeing then drop me an email.