Trying to find a picture but will post this description...
3) Cable kickback. This is your kickback on steroids. Drag a bench to the cable machine. Put on the ankle cuffs that let you chain yourself to the cable machine. I set the cable machine for 40 pounds (start with a lot less if this is the first time you've tried this), climb up on the bench, and do three sets of ten straight kickbacks. You want to kick back and high, but not so high you hyperextend your lower back. This exercise will show you just how much a butt can sweat.
4) Cable bent leg kickbacks. As above, but instead of extending my leg back straight, I keep it bent at the knee when I kick back and up. Three sets of twelve reps. This exercise will show you that it is possible to make your butt sweat even more than you imagined possible.
5) Cable standing kickbacks. Move your bench out of the way, up the cable machine to 50 pounds, and kick back. At the end of all this I guarantee your whole body will be covered with sweat. Do this routine on a day when you don't have any need to stand, sit or walk.