Rapper Sir Mix-a-Lot was onto something with his 1992 hit “Baby Got Back”: Big butts are meant to be celebrated. (Pitch Perfect fans, you know what I’m talking about;) The gluteus maximus and its muscle group partners are the primary movers of the body. These muscles not only need to be trained to generate power and disperse force, they love to work. Indeed, glutes respond readily to training. So, that’s what we are going to do during this Asana Lab: Work our butts off.