Last year I was running really well at parkrun and could complete the course the 5k course in 32 minutes. Then I suffered Afib which lasted two months before returning to normal after Amiodarone. Since then on Flecainide and had two mini episodes 2 and 5 hours. Now I find its is taking me 5 minutes longer to do the same distance and I have to keep stopping as I feel I've given my all. A little rest/walk and I can start again.
At the age of 70 I believe my MaxVo2 should be 150 (220-70) but when I examine the data my watch has collected my MaxVo2 has gone to 175 at the times I have had to take a rest.
Should I be worried? I've stopped running now until I can get some answers. Thank you