Twisted Chair Pose (Parivrtta Utkatasna)
Twisting the body in a chair position is calling on the abdominal muscles and strong leg muscles. This combination is toning and cleansing for the body all at once.
Triangle Pose (Trikonasana)
The power in this posture comes from the ability to keep the upper body lifted and aligned properly. Without leaning the body weight on the front leg, the abdominals will do the bulk of the work. The abducted arms are strengthening as this posture is maintained.