I was having Slip Disc problem in year 2005 and was confined on bed for 35 days. MRI reports revealed problem in L5 S 1 area. Doctors advised me not to sit on ground and sleep sideways by bending both the knees and keeping pillow in between them. Although I do not have that pain again but Now my body has become very stiff, I can not bend my knees and having very poor flexibility what should I do.