Hello, Never been on a running forum before but I need a bit of advice. I have been jogging/running up and around the local hills since 1980 which was when the jogging 'craze' was going on! I am now 63. Up to January of this year I could trot up all of the inclines with no problems however I noticed during January that I could not get my breath and felt weary. A visit to a local town with my wife found me gasping for breath at the top of a flight of steps I usually ran up! Alarmed at this I went to Redditch Hospital where it was discovered I had multiply pulmonary embolism's in my lungs and a heart flutter. After a lay-off of a couple of months I started to walk my three mile circuit and am now back jogging. I find my legs get 'weary' and tired now. I wonder if its caused by the Warfarin I am on or the beta blocker which I gather slows down my heart....slow heart beat...less oxygen getting to my legs??? Anybody out there been on this route before?