You can also incorporate lots of wide arm stretches and heart - opening poses into your yoga practice to open the lungs and stretch the connective tissue that supports them. (jenniferweinbergmd.com)
The seats have wider arm rests as well so you are not competing for the arm rest with the person next to you. (seatguru.com)
I never got into the extra wide arms that have been popular for way too long. (theinspiredroom.net)