Yoga is an excellent exercise; it can help relieve many of your daily aches and pains such as low back pain and sciatica pain, it helps us with building a strong core and having a better posture!
The Yoga vide shows you how to better align your Spine and relieve your lower back pain with 3 easy; yet extremely effective movements:

1. Childs Pose (Balasana)
2. Cat Curls (Bidalasana)
3. Downward Facing Dog (Adho Mukha Savanasana)
More info:
http://positivemed.com/2014/05/19/yoga-lower-back-pain/

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