2nd core exercise in our top Four...
Start the video from 1min 12secs.
DYING BUG:
This is an awesome drill for core activation. The video pretty much says it all. I use this daily with clients and it's a great follow on exercise from the previous breathing drill. Also, don't forget to BREATHE throughout this drill! Exhale as your leg is lowering. Holding your breath is a cheat ;-)
Give it a go :-)