I learnt to do the bridge both in Pilates and Yoga classes. It is a very useful exercise for the butt. Last night I did the bridge after a few weeks of not practicing it and now my butt is aching. It’s a good sign I guess because it means that I had worked out on those butt muscles. To do the bridge, lie on your back with knees bent. Then lift your butt off the floor and hold for a few counts. When you are strong enough, lift one leg into the air and maintain the same position as you balance on one leg. Hold this pose for a few counts till you feel those buns burning then switch sides. Be warned that your butt will ache the next day if you have not been working out your gluteous muscles.