Hi Kavita. just saw your post and wanted to give you some of my experience. I had severe knee arthritis and joint inflammation for many years, and yoga helped so much. As it progressed, I had to modify and not do certain poses, such as lunges, triangle, any knee twisting (such as in warrior), malasana, crossed legged sitting, or any pose that put pressure on my knees. I used the chair for many asanas, and and then for 2 years during my 5! yes FIVE knee surgeries (for knee replacement) I was very restricted and had to do yoga in the bed. When I finally began recovering, (since last December) I slowly worked from the bed, then from a chair, then CELEBRATED getting down on the floor. I still have some difficulty getting up from the floor, but I am doing better and better. I also must use pillows for support and protection of especially my knee that had 4/5 surgeries. It is still tight, from scar tissue, but MUCH improved, and the right knee is very good. I can sit cross legged now, but it is a “loose” cross, and I am improving every day on the things I couldn’t do before. Let me tell you this: I learned MANY alternatives and modifications for achieving the stretches and reaching the target areas requested through the regular asanas. Ask your teacher for modifications for your knees (Neha and Annelise were my ANGELS). I have been able to do my practice, and do not feel it is “less than” at all. It helped me learn my body MORE to try different movements and be able to access the target areas! I feel I have expanded my practice, and know that over time, I may (or may not) be able to achieve the standard pose, but I am still achieving a wonderful practice and it has helped me TREMENDOUSLY. Don’t give up, just become more mindful of your body and what it needs. Good luck, and you can contact me any time if you have questions and need modifications. Take care, Gail