Bridge is great for opening the front body, as it stretches the chest, shoulders and hip flexors. This is the perfect pose for someone who sits all day, or who has poor posture. Beginners can use a yoga block as shown in this post to help keep the knees in line with the hips.
How to do Bridge Pose
Begin laying down, tilt the pelvis back so the low back is in the mat. Inhale and bring the feet as close to your butt as you can. When you're ready, lift the pelvis up, and rock side to side so the sides of your arms are on the mat and the hands are interlaced. Breathe 5-7 breaths in bridge pose, and come down gently.
PS- More yoga tips.