I've been doing CrossFit since December. Disclaimer: I don't think Crossfit is optimal for strength development, but for me personally, it's the best solution for getting my lungs healthy again. Lifelong asthma. Well controlled for many many years, but very poorly controlled for the past couple of years, especially since getting Covid.
Been using my rescue inhaler 4-5 times/day since then. Before bed. Waking up at night using it due to SOB(shortness of breath). Again when waking up. And multiple times throughout the day. I'd get 3 rescue inhaler refills at a time and they were empty in no time.
I'm not a fan of cardio. Definitely not into running slowly for a long time, and don't think that is very healthy anyways. I like the high intensity of Crossfit. The structured classes are what I need to *force* me into a rigorous cardio routine. At first, it was terrible. My lungs would literally hurt, painful, the entire evening and into the next day. It was horrible.
Now, it's much better and just sucks. But, I can push myself pretty darn hard, and 10 minutes after the workout, my lungs feel good, normal. I'm going all day without using my rescue inhaler at all. My lungs WILL COMPLY WITH MY DEMANDS TO GET HEALTHY AGAIN!
I don't know for sure what the time frame will be, but I'm hoping that another 3-4 months will start to bring my cardiovascular capability in line with my physical/strength capability.
Currently doing MWF for an hour, and will be working in some dedicated strength training a couple times/week since I really miss being as strong as I used to be before COVID.
Another missing ingredient is diet......I've come to realize that I can't effectively slim down without tracking calories carefully. Today will hopefully start dedicated tracking and 1-2lbs/week of weight loss. 199 lbs at 5'8"
Can still back squat 350-400 lbs, and deadlift 450-500(haven't tested recently), but I'd love to get those numbers to 500 and 600 before I get to old to do so.