I’m wondering if anyone in this community has had similar experience to me and can give me some guidance. I’m 60 years of age and on 2 April 2020, I had a stenosed bicuspid aortic valve replaced with a pig valve in a successful mini sternotomy operation. Prior to that, my most recent echocardiogram showed that I was at the beginning of the severe category even though I felt fine. Immediately prior to the operation I had been a very fit road cyclist (that’s pushbike not motorbike) cycling around 170 kilometres per week and although my cardiologist said that I would notice an almost immediate aerobic improvement post-surgery, my progress has been slow. 10+ weeks post-surgery I say that I am only about 60% of my previous fitness. Is there anyone in this community who has been very fit prior to surgery and who can give me some guidance as to when I could expect my heart to perform optimally in an athletic sense ?