I have a board, it's 7 Feet long and 3 feet wide. A friend of mine made it for me and it's beautiful. It's made from solid 150 year old Douglas fir (it's stupid heavy too). It's elevated 4 inches off the ground on 4x4s, but I stand on top it so I don't get some kind of advantage. Maybe one day I'll wear a hole in it
I also don't use gloves, but that can be a problem if you get sweaty hands. You do need something for your knees though.
All this speed demon prostration talk is disturbing....
Killing yourself is not the point (I used to be catholic masochist), but neither is prostrating in the most comfortable and convienent way either. People often use the excuse that they saw a Tibetan do it so it must be okay to blast out prostrations on some kind of spring board.
What's the difference between westerners and Tibetans busting out 100 in 15 minutes vs really concentrating on what thier doing and maybe doing 100 in 60 minutes? I am not sure or qualified to judge, but you do 100,000 so you can do one right. I am 250 lbs and I can do 100 prostrations in 20 minutes.....it means nothing other than I will get done sooner and be no more enlightened. However, I am not saying just do one a day, like was said before start out slow and work your way up.
DGA's points are all really good. The point of reciting all this jargon and throwing yourself at the ground is not to punish yourself but to recognized your real nature, by prostrating you are paying respect to the guru and lineage and vowing to discover your real nature which is inseparable from the guru for the sake of all sentient beings. It should be a joyful, purifying and focused activity. Doing prostrations is a form of guru yoga, as are all the other parts of the ngondro.
Good luck and my all the blessing of the Buddha's create good circumstances for your practice.
Now this guy knows how to prostrate: