"To me, the most important thing is not a specific Rolfing hour; it's the progression from hour to hour. It's the way you prepare in the second hour for the third hour so that you can get results of the third hour. You can't do ten hours in one hour. You've got to build up. You've got to build up the tone of the muscles." from Rolfing and Physical Reality by Dr. Ida P. Rolf Ph.D.