I just love pigs. My grandmother once said that baby pigs are probably the most perfect animal baby. And as I had raised them (farm pigs), as well as having a pot bellied pig for many years, I have to agree. Very, very smart as well.
Planks are effective on their own, but add a stability ball in the mix and you'll really feel the burn in this core and butt-toning move. Lie on an exercise ball under your belly and walk your hands out until the ball is under your shins. Your hands