The New York Times recently published an article with 12 poses that you can do in 12 minutes, to increase bone strength.
The 12 poses are:
Tree Pose * Triangle Pose * Warrior 2 Pose * Side-angle Pose * Twisted Triangle * Locust Pose *Bridge Pose * Supine Hand to Foot 1 * Supine Hand to Foot 2 * Straight Leg Twist * Bent Knee Twist * Corpse Pose
And here they are for you, in video format. Enjoy!