Hi. I've just been diagnosed with AF last week and am on warfarin (44 years old). Have to have more tests in a few weeks. I assume when my INF is stable. The heart specialist was a bit vague in regards to what physical activities i can do a nurse told me I shouldn't anything that increases my heart rate due to the risk of a blood clot coming loose is this a real risk? I have cold feet, weakness in my legs blurred vision right eye only, breathless more than usual, tiredness. Also have been diagnosed with sleep apnoea a few years ago and am on CPAP. Also have mild asthma. Thanks for your help.