I have been seeing some post's about zombie dudes not being able to do swivel hips.
What you need to do if you have problems with this is start sitting on the ground when you watch TV. Try to sit cross legged on the ground for 30 minutes a day, everyday. I know you watch TV for 30 minutes a day.
After about a week of the cross legged ground sitting, take one leg out and start to sit in a static swivel hip pose, while watching TV. Over the course of the pose and over time your hips will start to sink down to the ground.
Eventually you should be able to sit in a full accomplished pose or "Siddhasana".
If you cant sit still try to switch legs every ten minutes using the half accomplished pose.
A short description of getting into a half accomplished pose from sitting cross legged, which is a close variation of static swivel hips...
"Bend the right leg back around the thigh and tuck the right foot along the contour of the buttocks. Leave the left leg in front of the torso, tucking it close to the groin."
No doubt your legs will fall asleep, ankles can get sore and hips as well. Deal with it, all that goes away after a few months. Eventually, you will be watching your favorite show, some dude will solve a murder and it will be the dead Marines sisters cousin who tried to change identities to get rich or something, and you will look down and realize your whole hip, butt, and legs are touching the floor.