Triangle Pose is one of the best poses for your entire body, and one of Dr Beebe and Evan's personal favorites. Because of it's total body affects it can help prevent injury when used as a recovery position after a work out. Remember prior to working out you want to do large movements and active stretching to warm up the body. After you work out a stationary or static stretch like triangle pose is great for recovery. This pose will increase strength in the knee, thigh, core and ankle while it will stretch the hip, shoulder, knee, vertebral column, thigh, side body, spinal muscles, calf and groin.
As with all yoga poses it's more important to do them correctly rather than deeply so listen to your body and treat it right!