with this fucker
i've been doing this for ages now, but only once a week. i do it standing (not from the knees), and extend as far as i can. i've gotten pretty good at it, and it's still the single most brutal exercise i've ever done. it's pure suffering, all the time. it fucking sucks... but you get the kind of abs that make pablo popovitch envious.
so fast forward to the covid-19 lockdown, got fuckall to do other than workout at home, and i start doing this like 5 times a week. my abs get brutal! but then one day i get this weird pain on the side of my groin. woops, went ahead and tore something, didn't i?
tl/dr: i'm an idiot.