A horizontal support arm is mounted for upward and downward movement on a vertical support column. An interface unit having an actual mass value is disposed on a free end of the horizontal support arm and is adapted to be grasped and lifted by a human subject. A simulated mass value independent of said...http://www.google.fr/patents/US5348519?utm_source=gb-gplus-shareBrevet US5348519 - Exercise and diagnostic apparatus and method
