Novel tools and techniques for teaching a player the proper alignment when addressing a golf ball. In one aspect, such tools and techniques provide an alignment aid that allows the player to visualize both the intended target line of the shot as well as the position of the ball relative to the player's stance, allowing the player to easily modify his stance to obtain the proper alignment.

The device for lower extremity muscle force measurement in isokinetic movement conditions consists of a supporting surface (3) for knees, angular position sensor (4) equipped with an arm (5), stand with dynamometers (2) and a control unit equipped with an imaging device and containing firmware to measure, record and evaluate data from the angular position sensor (4) and dynamometers (2) connected to it. Procedure for the measurement carried out on the device is defined by the forward angular motion of the measured person kneeling on the supporting surface (3), thus producing pressure on the arm (5) that is pushed in the direction and speed of the measured person's motion, wherein the control unit (6) evaluates the change in angular position of the arm (5) and indicates the current and required speed of change in angular position on the imaging device to maintain the isokinetic movement.

The present invention relates to delivery of content that is driven by input from one or more performance sensor units, such as performance sensor units configured to monitor motion-based performances and/or audio-based performances. Embodiments of the invention include software and hardware, and associated methodologies, associated with the generation, distribution, and execution of such content. Particular attention is paid to technologies that enable the delivery of skills training content that provides for expert knowledge variations in training content for various skills.

Embodiments of the present invention are directed to devices, systems, and methods for implementing drills and providing coaching instructions to users. Embodiments may load a drill, measure values obtained from one or more sensors installed on a player's tennis racket and/or worn on the player's body, and use those values to detect various parameters, such as the physical impact of a ball at the player's racket. Embodiments may then output a coaching instruction to the user. Embodiments may also include adding customized coaching instructions to a drill.

An example exercise tracker includes a grip for receiving an adjustable amount of exercise resistance, a force sensor having one or more strain gauges programmed to output a force signal representing a force applied to the grip, and a motion sensor programmed to detect movement of the grip and output a motion signal. The exercise tracker further includes a processor programmed to receive the force signal and the motion signal and determine, from the force signal and the motion signal, exercise data including the amount of resistance applied to the grip.

A wearable device for tracking swim activities of a user is provided. The wearable device may include one or more sensors configured to generate sensor data, and based on the sensor data, the wearable device may determine swim metrics such as swim stroke count, swim stroke type, swim lap count, and swim speed. The determined swim metrics may be filtered based on one or more swim periods during which the user is likely to have been swimming. The wearable device may determine such swim periods based on the sensor data and/or the determined swim metrics.

The invention relates to a sensor apparatus, comprising: a sensor unit, a wireless communication unit configured to directly or indirectly transmit and receive data to and from an external source, and means for receiving identification information from a sports item while being attached to the sports item, wherein the apparatus is initiate identification of the sports item in response to a trigger from an identification activation element in the sports item.

Exosuit systems and methods according to various embodiments are described herein. The exosuit system can be a suit that is worn by a wearer on the outside of his or her body. It may be worn under the wearer's normal clothing, over their clothing, between layers of clothing, or may be the wearer's primary clothing itself. The exosuit may be assistive, as it physically assists the wearer in performing particular activities, or can provide other functionality such as communication to the wearer through physical expressions to the body, engagement of the environment, or capturing of information from the wearer.

System and method to monitor an exercise posture of at least one user are provided. The system includes a flexible substrate placed on top of a mat coupled with one or more contact sensors configured to generate a contact signal upon making a contact of at least one part of a body of the corresponding at least one user with the mat while performing the at least one exercise on the mat. The system further includes a processing subsystem configured to receive the contact signal, and to receive an angle signal generated by at least one inertial sensor upon measuring an angle of at least one user while performing the at least one exercise, to generate a combined signal, to compare the combined signal with a pre-defined set of exercise posture signals and to monitor the exercise posture of the at least one user.

An exercise rating and improvement system comprising: a feature amount extraction unit for extracting, from information obtained from a subject, a feature amount about exercise efficiency; an rating unit for rating exercise efficiency of the subject by comparing the extracted feature amount and a feature amount to be compared; and an improvement information providing unit for providing, on the basis of the rating result, information such that the feature amount of the subject approaches the feature amount to be compared.