Details:
here some examples
https://www.girlswithmuscle.com/1193551/
https://youtu.be/X0Q71ruE3kU Check this out! Its Stefanie Millinger
ye I even tried that one a couple times xD insane. but its way easier for small people tho
omg that mckenzie girl is amazing
Love the second half of this video. She's not doing your typical crunch or leg raises, but taking all those hits just by her exposed abs is nothing short of amazing.
Veronica Valentyna also does some heavy ab workouts doing situps at an extreme angle.
Pernilla stryker also has an insane core
That setting on the abs machine is NUTS!
It's crazy. Ridiculous strength!
here some examples