Computers and computer peripherals for presenting virtual reality by simulating and/or presenting a visual, auditory and/or tactile environment to a human being; computer hardware, computer software, computer peripherals and sensors, all for detecting and/or monitoring physical condition and/or medical condition of medical patient, for detecting and/or monitoring location of medical patient, for detecting, monitoring and measuring variables in medical patient's environment and communicating physical condition, medical condition, environment and location information and other patient health information to healthcare professionals, family members and other interested third parties; computer hardware, computer software, computer peripherals, sensors and other mechanical and electrical devices, all for creating virtual environment, for interacting with virtual environment, for detecting, measuring and responding to forces and position changes by user, for causing forces applied to user and causing position changes to user for use in training military personnel and civilian personnel; computer hardware, computer software, computer peripherals, sensors and other mechanical and electrical devices, all used as an interface between individual user and global or local computer network