The basic bridge isolates and strengthens your gluteus (butt) muscles and hamstrings (back of the thigh). When done correctly, the move can also enhance core stability by targeting your abdominal muscles and the muscles of lower back and hip. If you have a workout routine already, it's easy to add the bridge in or pair it with other moves to create your own full-body workout. It's also a good warm-up exercise and a basic rehab exercise to improve core and spinal stabilization.