Proof of item:
You will experience and focus on how to use the powerful, strong muscles of the lower back and pelvis to free the neck and shoulders, thus reducing the strain in the arms, fingers, and wrists. These lessons are especially beneficial for musicians, for people who work at computer keyboards and for anyone who wishes to improve the use of their arms and hands. By improving posture, breathing, coordination and thinking as you learn to move in new ways, you can prevent injury and improve your performance skills.
AMAZING Seller, Item as described, GREAT packaging! A+ | Mary Spire – Optimal Moves Effortless Use of the Arms and Hands Vol 2