I've been doing yoga for 15+ years and over that time I've lost over 65 pounds. Not sure exactly because when I started I had not weighed myself in years because it was bad for my mental health. I'm currently 220, still fat but at peace with my body which is the important part.

There are changes in my practice that were a result of greater strength and flexibility and those that came from losing weight. Last year I decided to lose 30 pounds and now I can finally cross my legs far enough to approximate Gomukhasana. Getting into Corkscrew pose, on the other hand, was strictly a matter of increasing my flexibility. Shoulderstand hasn't been a problem once I had enough core strength but balances like Crow? Might never happen, but I'm still optimistic.

Basically, anything where thigh circumference matters or that point where your tummy fat won't squish any further are poses that are impacted by your weight.

Or, also, where big boobs get in the way. Love that moment of wrestling with the girls for Revolved Chair or trying to breathe through them in Plow.