I, too, have some knee issues occasionally that will flare up. Sometimes instead of cross-legged, I will sit with my legs straight out in front of me or in a half-butterfly pose. I can never do malasana fully (squatting pose because it is tough on my knees), so I will do something else like a forward fold or do a half-squat instead. Modify what you need to and take care of those knees. 
3 Likes