Aspects relate to a portable device that may be used to identify a critical intensity and an anaerobic work capacity of an individual. The device may utilize muscle oxygen sensor data, speed data, or power data. The device may utilize data from multiple exercise sessions, or may utilize data from a single exercise session. The device may additionally estimate a critical intensity from a previous race time input from a user.

There is provided a limb exercise device comprising: a force sensor configured to determine a weight applied to the device; a sliding component configured to facilitate the sliding movement of the device along a separate surface, wherein the separate surface is a surface that is separate to the device, wherein the sliding component comprises a part of an external housing of the device; a device movement sensor configured to determine a movement of the device on the separate surface; a limb position sensor configured to determine a position, in at least one dimension, of a limb of a user positioned above or adjacent to the device; and an output device configured to output an indication in dependence on a signal from at least one of: the force sensor, the device movement sensor and the limb position sensor.

A system for measuring golf ball trajectory characteristics is disclosed. The system includes artificial grass with a launch location for a golf ball and a plurality of wide-angle distance optical sensors mechanically connected to the artificial grass positioned such that a field of measurement of each wide-angle distance optical sensors intersects. The system also includes a central processing unit connected to the wide-angle distance optical sensors, the central processing unit configured to collect distance measurements from the wide-angle distance optical sensors and to determine a velocity of a trajectory of the golf ball from the launch location to the intersection of the field of measurement of each wide-angle distance optical sensors given a distance between the plurality of the wide-angle distance optical sensors, a distance between the plurality of the wide-angle distance optical sensors and the launch location, and the distance measurements from the plurality of the wide-angle distance optical sensors. Once the velocity of the trajectory of the golf ball is determined, the central processing unit transmits the velocity to a display.

The therapy device comprises a deflection tube and a handle, which are rotably disposed so as to be mutually perpendicular or parallel to one another. The deflection tube is made of transparent plastic or glass. It is semi-circular, closed on both ends, and filled with a transparent liquid that contains a freely floating bubble or ball, which acts as an indicator. When the handle is rotated, the indicator floats away from the center of the deflection tube toward one of its ends. The tube is marked at regular intervals with indicia, preferably numerals, which quantify the degree of deflection of the indicator toward an end of the tube, with higher numbers corresponding to greater deflection and hence greater rotation of the handle.

An annular multimedia stadium goalpost and multipurpose target display system. The system includes a rear support-and-multimedia assembly for supporting the net and producing audible and visual effects. The system also includes a at least one annular frame and a primary projector. The rear support-and-multimedia assembly includes a support assembly and a multimedia bar system. The support assembly maintains the annular frame and the multimedia bar system in an orientation that facilitates playing sports and projecting information. The multimedia bar system includes a plurality of lights, a plurality of first speakers, a plurality of sponsor display panels, a retractably screen assembly, and a retractably underground projector in order to audible and visually convey content regarding the sports game and advertisements to the audience. The system also includes an annular display, and a multitude of rangefinder laser-detector video cameras to track, record, and present gameplay live.

Computing device enhanced training environment system comprising a computing device, I/O subsystem for permitting a user to enter at least one attribute of the training or of the trainee, a plurality of sensors for generating sensory information, a training environment in which a training activity takes place, a database containing training related information. The computing device enhanced training environment system configured for at least one of the following: design a training program for a plurality of users, monitor training program performance, monitor training performance, instruct a user about the training, determine and/or set difficulty level in training apparatus.

The walking training system includes: a treadmill; a determination unit configured to determine whether a walking of the trainee on the treadmill is an abnormal walking based on predetermined abnormal walking symptoms; a display unit configured to display a result of a determination of each of the abnormal walking symptoms; a reception unit configured receive a selection of at least one result of the determination from the results of the determinations, each of which displayed on the display unit, in which regarding pieces of advice about adjustment items for improving the abnormal walking symptoms in the result of the determination which the reception unit has received the selection, the display unit preferentially displays the pieces of advice that are common to pieces of advice about adjustment items for improving the abnormal walking symptoms in a result of another determination in which the determination unit determines the abnormal walking.

An interchangeable and weight adjustable golf grip including at least an end cap body having integral receiving ports adapted to receive variable weights, electronic chips, sensors, gauges, lasers, cameras, or biometrics within and wherein the end cap is capable of housing the various weights, chips, sensors, etc. within the end cap so that a player can interchange the weights or sensors without removing the golf grip from the shaft in order to make adjustments and so that the player can play golf without removing any other portions of the grip. Further, the invention includes contemplation of a tip collette with integral receiving ports adapted to also harbor similar weights, or sensors, etc. Data from the sensors may be transmitted by Bluetooth transmission to a smartphone or a ball launch monitor system for analysis.

A jump training apparatus and method designed to allow athletes to perform sets of standing vertical jumps. The apparatus is comprised of a mount, a T-tube, a notched post, and a plurality of vertically hanging rotational vanes of varying lengths. Each rotational vane has a longitudinal member with a planar surface. Each rotational vane has a cylindrical opening with a stop member. The plurality of rotational vanes are placed over the notched post by aligning the stop member with a channel cut in the notched post. When the stop member contacts the edges of the channel, it causes the rotational member to stop rotating. A central bump in the channel further inhibits motion.

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.