im a gymnast who have been training for about 5 years now doing bodyweight exercises only, like l-sit, front lever, back lever, iron cross, 90 degree pushups, human flag, one-arm pushups, one-arm chinups and planche. im 180cm high and weigh about 86kg with 6% bodyfat.
exepct from the l-sit i havent really done any direct ab work. as you can see on my pic in the avatar i already have decent abs but i want them to get the even bigger. want them really big.. i mean huge. i dont want to use weights, so could any of you recommend some ab exercises that is very demanding and effective which dont require the use of external load (weights)?