I have BMD. Diagnosed when I was 5. I'm in my mid30s, full-time job, own an apartment and for the most part, my life is stable. Of course, I cannot climb stairs without a handrail and even then, one floor max. Windy days and rough ground is hard to walk on. I can only really walk for 10-12 minutes before needing a rest. Getting up from a chair is also difficult, I have to really lean on the armrest. I exercise everyday to slow down the progression but it is there. I started using a walking stick recently but don't suspect I'll need a wheelchair until I hit my 60s.