The pain was 9 out of ten...like pains of childbirth..the tears flowed with pain and I had waves of heat and then cold. This pain when sitting lasted for five days. 4am to 10pm The teacher instructed me to sit longer...1 and a half hours at a time instead of one. but it was relentless. It would leave only when I stood up ...but three minutes into each sit it was back. I was exhausted.