I sit in seiza to practice zazen. But after 20-25 minutes of my zazen I feel like an earthquake in my body. My legs begin shake very much and I can`t concentrate my mind. What can I do and is this a good thing to use seiza for zazen or I should try to sit in other posture?

December 3, 2012, 11:09 pm Sitting in seiza is very good for your posture, yet one cannot sit in it usually for a long time. Then it would be good to change into half lotus posture.