An interface, in the form of an isometric exercise system, according to the present invention includes an effector with at least one sensor, a platform and control circuitry including a processor. The platform accommodates a user in a standing position and includes the effector attached thereto. The...http://www.google.sh/patents/US20070155589?utm_source=gb-gplus-sharePatent US20070155589 - Method and Apparatus for Operatively Controlling a Virtual Reality Scenario with an Isometric Exercise System
