A ball hitting practice device includes a shaft having a target at a distal end, a grip at a proximal end, an accelerometer, a microprocessor, and a way of providing feedback to a person hitting the target. A ball hitting practice system includes a ball hitting practice device and a computing device wirelessly communicating with the ball hitting practice device. A method for practicing ball hitting involves striking the target of a ball hitting practice, transferring timed acceleration data to the computing device, correlating ball hitting parameters with a training condition and displaying the correlated ball hitting parameter in a display.

A method for estimating information on a golf swing posture is provided. The method includes the steps of: adjusting a determination criterion for a golf swing of a user on the basis of information associated with the user's golf swing; and estimating information on a golf swing posture of the user on the basis of the adjusted determination criterion, wherein the information associated with the user's golf swing includes at least one of a photographed image of the user's golf swing and information on a swing posture of a comparison target golfer selected by the user.

A program is presented to a user including a stream of content including a first auditory content and a first visual content related to the workout. A context state of the user participating in the workout is determined based on information from a sensor. A responsive content is selectively added based on the context state of the user to the stream of content in a manner that avoids conflict with the stream of content.

An approach for providing real-time feedback during a sports activity (e.g., golf play) based, at least in part, on analysis of sensor information, is disclosed. The approach involves receiving sensor data associated with one or more sensors arranged to track playing technique information of a player engaged in a sports activity. The approach also involves processing the sensor data in real-time to determine the playing technique information. The approach further involves retrieving baseline information for the player. The approach also involves comparing the playing technique information with the baseline information. The approach further involves generating, in real-time with the engagement of the sports activity, an instructional message to modify playing technique of the player based on the comparison. The approach also involves initiating presentation, during the sports activity, of the instructional message to a user interface of a device accessible by the player.

Implementations generally relate to determining a kinematic sequence. In some implementations, a method includes obtaining a video of a person performing an action. The method further includes determining from the video a plurality of points associated with the person, where the determining of the plurality of points is performed for each frame of the video. The method further includes converting two-dimensional (2D) coordinates of the plurality of points to three-dimensional (3D) coordinates, where the converting is performed for each frame of the video. The method further includes determining a movement of the plurality of points based at least in part on the 3D coordinates.

A physical exercise apparatus includes a frame equipped with a crankset and a saddle. The saddle includes a chassis fastened to the frame, two saddle parts, and articulation members for articulating each saddle part relative to the frame around a pitch axis, a roll axis, and a yaw axis. The apparatus includes sensors for detecting a pitch movement, a roll movement, and a yaw movement of each saddle part respectively about the pitch, roll, and yaw axes, these movements resulting from pedaling made by a user. At least one calculation unit determines, from output signals of the sensors, angular amplitudes of the pitch, roll, and yaw movements. At least one screen is provided in order to display, depending on the angular amplitudes determined by the calculation unit, the position on each saddle part of a bearing point of an ischium of a user in the process of pedaling.

A program is presented to a user including a stream of content including a first auditory content and a first visual content related to the workout. A context state of the user participating in the workout is determined based on information from a sensor. A responsive content is selectively added based on the context state of the user to the stream of content in a manner that avoids conflict with the stream of content.

A fitness equipment control system is provided. The system includes a receiver and a mobile apparatus, and performs the operations: generating a first control signal based on a training course of a user; transmitting the first control signal to the receiver to make the receiver generates a signal which is readable by the fitness equipment according to the first control signal and transmit the readable signal to the fitness equipment; receiving at least one physiological signal from at least one of the wearable devices worn by the user; based on the training course and the at least one physiological signal, generating a second control signal; and when the second control signal is generated, transmitting the second control signal to the receiver, wherein the receiver generates a signal which is readable by the fitness equipment according to the second control signal and transmits it to the fitness equipment.

Systems, devices, and methods are described for providing, among other things, a real-time feedback to novice dance associated spotting, center of gravity, timing, etc. The disclosed technologies and methodologies include a spotter unit configured to generate a time sequence of pixel images associate with a performance event and to generate position information, movement information, timing information, or the like associated with a performance event, In an embodiment, the disclosed technologies and methodologies include a trainer unit configured to compare the position, movement, timing information, or the like associated with the performance event to user-specific target position information, user-specific target movement information, or user-specific target timing position information, and to provide one or more instances of a fidelity status associated with the performance event.

An interactive AI coaching-based musculoskeletal exercise and rehabilitation training system, includes: a user state information measurement unit connected to a cloud server through a wired or wireless network and measuring state information, the state information being information about a user's exercise posture or physical condition; a display panel displaying necessary information to a user during exercise based on the state information measured by the user state information measurement unit; an exercise unit allowing a user to perform a resistance exercise or a balance exercise; a coaching engine receiving and analyzing the state information measured by the user state information measurement unit during a user's exercise using the exercise unit and providing AI-based interactive coaching information to a user through the display panel; and an expert terminal providing rehabilitation service information to a user exercising using the exercise unit through the display panel in parallel with the coaching engine.