A head guard is provided. The head guard includes one or more sensors as part of an sensory input and communications system. The head guard wirelessly communicates data to remote computing devices for intelligent data collection.

The image capturing part 201 captures a ball in flight with a camera continuously. The image corresponding part 203 generates a first registered ball image obtained by making a size of a first ball image in a first capturing image captured first correspond to a size of a second ball image in a second capturing image captured second. The 3D model constructing part 204 constructs a 3D model of the first registered ball image obtained by converting a camera coordinate system of the generated first registered ball image into a world coordinate system. The virtual rotating part 205 rotates virtually the constructed 3D model of the first registered ball image by using a rotation parameter estimated in advance and rotation matrix information. The registered image generating part 206 generates a second registered ball image in the camera coordinate system obtained by converting the world coordinate system of a visible surface to see from the camera in the 3D model of the first registered ball image after the rotation into the camera coordinate system. The difference calculating part 207 extracts a second compared ball image corresponding to the second registered ball image in the second ball image, and calculates a difference between the second registered ball image and the second compared ball image. The rotation parameter determining part 208 repeats the virtual rotation of the 3D model, the generation of the second registered ball image and the calculation of the difference, and determines a rotation parameter to minimize the difference as a real rotation parameter.

A walking system that includes a walking dish formed in any one of a circular shape, a semi-circular shape, and a polygonal shape; a rolling ball formed on an upper surface of a ball fixing device; multiple auxiliary balls having multiple rolling balls on the surface of the walking dish and formed below the rolling ball so that the rolling ball smoothly rotates in all directions in 360 degrees; the ball fixing device fixing the auxiliary ball and the rolling ball while allowing the auxiliary ball and the rolling ball to rotate in all directions in 360 degrees; and a ball fixing table formed with the ball fixing device for joining the multiple ball fixing devices on the inclined surface at a predetermined interval to allow a user to walk in all directions in 360 degrees according to a virtual reality or walking motion image.

A training apparatus includes a fixed frame, an training rod, a motor, a rotation information detection sensor, a tilt angle calculation unit, a feedback current detection unit, a position difference calculation unit, and a determination unit. The training rod tilts with at least one degree of freedom. The motor tilts the training rod. The rotation information detection sensor outputs an amount of rotation of the motor. The tilt angle calculation unit calculates a tilt angle. The feedback current detection unit detects a feedback current value. The position difference calculation unit calculates a position difference every time when a first time period elapses. The determination unit determines an error when the position difference generated during the first time period is a first threshold or higher, or when the feedback current value keeps a first current value or higher for a second time period or longer.

A system and method is provided for conditioning a group of muscles and joints of a subject including: a movement assembly including an arm having a handle, such that an angular position is created by the subject's joint when the subject grips the handle, a brake, connected to the movement assembly, configured to apply a work load to the movement assembly, and a sensor configured to sense the angular position of the movement assembly; and a computing device, in communication with the sensor and the brake, configured to sense the movement of the movement assembly relative to the brake, create an encoded signal representing the movement assembly and the movement over a period of time, and modify the brake to vary the work load during a movement of the movement assembly based on timing at the angular position and a predetermined regimen.

A method of adaptive control of a treadmill, the treadmill includes a base extending along a longitudinal axis, the base includes a first rotatable element and a second rotatable element adapted to rotate about respective rotation axes transversal to the longitudinal axis of the base. A physical exercise area operatively connects to the first and second rotatable elements. A motor is operatively associated with the first and/or second rotatable element. The motor is configured for rotating the first and the second rotatable and dragging in rotation the physical exercise surface. The method includes: determining by a data processing unit of the treadmill, a first electrical parameter of the treadmill representative of the interaction between a user and the physical exercise surface of the treadmill. The data processing unit controls the motor based on the first electrical parameter detected by the data processing unit.

A walking system structure, constituted by a walking dish formed in any one of a circular shape, a semi-circular shape, and a polygonal shape; multiple auxiliary balls constituted by multiple rolling balls on the surface of the walking dish and formed below the rotation ball so that the rolling ball smoothly rotates in all directions of 360 degrees; a ball fixing device fixing the auxiliary ball and the rolling ball not to be separated from predetermined positions while allowing the auxiliary ball and the rolling ball to rotate in all directions of 360 degrees; and a ball fixing table formed below the ball fixing device for joining the multiple ball fixing devices on the inclined surface at a predetermined interval to allow a user to walk in all direction of 360 degrees according to a virtual reality or walking motion image based on a stop surface.

In a running style analysis device, a first cadence acquirer 76 acquires, with regard to running of a subject, a cadence at a first running speed as a first cadence. A second cadence acquirer 77 acquires, with regard to running of the subject, a cadence at a second running speed that is different from the first running speed, as a second cadence. A judgment unit 80 makes judgment as to which of multiple running style types, which include a long stride type and a high cadence type, running of the subject falls under, based on the difference between the first cadence and the second cadence with respect to the difference between the first running speed and the second running speed. A result output unit 92 outputs a result of the judgment.

A method for adjusting a working state of an electronic device includes setting a predetermined value range of feature data of a user, and acquiring current feature data of the user from the camera device. The current feature data is compared to the predetermined value range of feature data. A working state of the electronic device is changed when the current feature data is out of the predetermined value range of feature data.

A method for adjusting a working state of an electronic device includes setting a predetermined value range of feature data of a user, and acquiring current feature data of the user from the camera device. The current feature data is compared to the predetermined value range of feature data. A working state of the electronic device is changed when the current feature data is out of the predetermined value range of feature data.