Abstract: An operating method of an electronic device includes receiving a program including a machine learning model generated by performing machine learning using, as training data, information on a plurality of skeletons associated with a specific motion of an expert and/or a professional athlete associated with a specific sport, information on a plurality of angular velocities associated with the specific motion, and/or a plurality of pieces of evaluated information associated with the specific motion, which are accumulated in a server, from the server, and executing the program and receiving information on second angular velocity for the specific motion of a user of the electronic device from a swing practice device based on execution of the program.

Abstract: Disclosed herein is a method for creating, by at least one server, an avatar based on a body shape, including acquiring first image information from a user terminal, deriving first skeleton information corresponding to a first pose of a user from the first image information, deriving body shape information corresponding to an outline of the user from the first image information, and creating a three-dimensional (3D) avatar corresponding to a body shape of the user based on possible human body movement information stored in a database, the first skeleton information, and the body shape information.

Abstract: Provided is an apparatus for training golf. The apparatus comprises a shaft, a head portion provided at one end of the shaft and a ribbon detachably coupled to the head portion, wherein the ribbon includes a plurality of flags formed at one end of the ribbon.

Abstract: Disclosed is a smart putter for a golf club including a putter head having a putting surface for putting a golf ball on one side thereof, a swing detecting unit that is provided in the putter head to detect a balance degree of the putter head, a communication module that is provided in the putter head to transmit balance degree data of the putter head detected by the swing detecting unit to an external device, and a control unit that stores the balance degree data of the putter head detected by the swing detecting unit and transmits the balance degree data to the communication module.