Is It Normal To Feel Tired All The Time After An Asthma Attack?

Hi in 1989 (26) years ago, I was taken to hospital while having an Asthma attach, nothing unusual I had been down this road many times before since I was 9. They had a few challenges & put me in ICU, my lungs burst & took a time out on my heart for 21 minutes, it left me in a coma for 3 weeks etc etc. Since then I have a few challenges and they all are a inconvenience I wonder if this could also be the reason why I get so tired all the time? It is a pain, I try a little work out in the mornings, some squats, dead lifts, bench press etc only for 45 minutes a day, I shower, have some fruit, green tea a protein drink 30g/m's & then I am stuffed & crash for an hour or so. It even happens worse if I do not work out. Mornings are the best time of day for me, come 10.30 on I start to slow down again.

I play a few games of chess on line, win & lose a few I try & read on line & books. I also try a Sudoku now & then med level.Testosterone stuff they have where I buy protein Powder but on a pension I can not afford a great deal of these & I have tried some but I still end up the same.

Hi I'm Greg do you have any Idea's here? Or is it just because of the cardiac arrest back in 1989? Thanks