[Fedora]

Yeah, sometimes it's easier to do the kicks than remember the names of them :) Trying to describe without pictures is hard--wish I had some webspace that wouldn't crash--but basically, there are two types of kicking motions that will get that muscle group. The standing versions are called side kicks and roundhouse kicks, and look like this while done when standing:

Side kick (lifts straight up and extends straight out):

Roundhouse kick (comes around rather than straight):

Doing similar motions while on your hands and knees or on your back will have a similar effect.

[Ramius]

I think I dated her once. :-)

[Wneighbor]

Yeah, my scrawny kid can do stuff like that. Looks VEY painful!