A more comfortable alternative to laying on the floor when using massagers such as a Chi Vitalizer or Thumper Versa Pro (in under-thighs/calves mode).  Positioned the unit at the foot end of a talalay latex mattress on a 13"x34" Masonite board (dimensions are not critical). The variable speed controller is very useful in this application since the best pulsations are at a mid-range setting.