This fantastic physical therapy exercise is great for activating and retraining your glutes and hamstrings. Just keep in mind when first starting with the bridge to focus on squeezing the glutes as the primary mover. Basically, try to keep your hamstrings relaxed as you lift your hips up.

For most people, this is one of the toughest parts of this exercise…hamstrings usually kick in too hard and may cramp. 

As well, when executed properly, this movement will teach proper hip extension using a braced core. These are both essential components of preventing, reducing or relieving low back pain.

To your bridging. 

Dev Chengkalath