I just tried this. I presume it should be:
"Ground levers: look stupid but are nails. Lie on your back and with your arms by your waist kick your legs, bum and lower back up to near vertical and lower them as slowly as possible infront of you. Your bum and lower back should only touch the ground at the same time as your feet. (you may have to tuck your legs in) ground levers also help deep lock on steep stuff, they also nail the triceps."