I was training torwards doing these a couple of years ago (they are fucking hard and no i didnt manage to do these) alongside doings chin ups, pistols (one legged squats) just thought i would share these i developed quite alot of strength in a short time doing these.
Kind of wish i had the motivation to continue doing these, i think this maybe of interest to those who do not train with weights, or you guys could google gymnastics strength training exercises. Most male gymnasts do not train with weights yet their strength levels are not far behind the likes of weightlifters and powerlifters.
Heres a link watch this insanely strong fucker
YouTube - My Planche Training