A method is provided for preventing back injuries related to sport motions or swings that includes setting an attachment height of a distal end of an elastic of a warmup and training device, the attachment height set to define an angle α backwards from vertical above center of a practice motion specific to a sport to be practiced, attaching a handle to a proximal end of the elastic where a type of the handle corresponds to the sporting activity to be performed, performing the practice motion while holding the handle and stretching the elastic, and returning to the beginning of the practice motion to repeat the activity.

A golf hip-turn timing practice device according to the present disclosure includes: a fastening belt; a first retainer; a plurality of second retainers; and a hip-turn link stick that is fitted in the first retainer and the second retainers in the longitudinal direction of the fastening belt to be fixed at the position and is longer than the width of shoulders. The golf hip-turn timing practice device provides an advantage in that the golf hip-turn timing practice device enables correct swing timing practice by timing a hip-turn, which is a movement of a lower body, with the movements of the arms and hands of the upper body in golf swing. Further, the golf hip-turn timing practice device provides immediate feedback when the timing is wrong, is easily worn on the waist, and corrects a wrong swing by accurately showing the plane by hip-turn.

A golf putting stroke practicing device includes a box-like housing designed to lie on any appropriate surface such as a carpeted floor wherein the front and bottom panels of the housing are provided with semi-circular/half-round cutouts that together create the realistic illusion of a regulation golf hole. The front of the housing is configured to deflect errant shots away from the hole opening. The device is easily carried and stored and can hold a number of regulation balls when not in use.

A golf target for use on a body of water having a water surface is described. The golf target comprises a first float having a first diameter and a second float having a second diameter smaller than the first diameter. The golf target also comprises a mesh having an outer perimeter, a mesh center, and a middle portion extending between the outer perimeter and the mesh center. The outer perimeter of the mesh is affixed to the first float, and the mesh center is affixed to the second float. At least a part of the middle portion is arranged to submerge under the water surface when the golf target is floated on the body of water.

A golf swing analyzer system for analyzing a golfer's golf swing. An inertial measurement unit (IMU) may be used to capture data regarding the swing. The IMU may be oriented along a hosel-axis and a face-axis to reduce the complexity of calculations to determine the path of the swing. Two IMUs may be used to permit correction of captured data, different orientations of the IMUs to increase accuracy of captured data, and a doubling of the captured data. The IMU may include a magnetometer that cooperates with a magnet that is adapted to indicate the time at or near impact of the head of the golf club with the golf ball. An LED system provides visual information to a user regarding the swing while the swing is being made.

Articles, kits, and methods for enabling an individual to improve their top-hand grasp of a handled object, such as a baseball bat. An article has an arcuate inner portion having a groove that extends along a length thereof, configured to reversibly engage the handled object. The article also has an irregular outer portion with a thumb support that arcuately extends from the irregular outer portion, configured to reversibly engage the individual's top-hand. During use of the article in a method of the invention, the article enables the individual to grasp the handled object with the fingers of their top-hand, rather than the palm and thumb of their top-hand, to improve acceleration, velocity, precision, accuracy, and form of the individual's swing when the article is not used, as well as improved safety and consistent grip technique when it is used.

An apparatus is provided for indicating a golf stance. The apparatus includes foot markers configured to provide an indication of where on the ground the golfer should place his feet and a reference grid arranged on the ground in a predetermined relationship relative to the foot markers, the reference grid including a plurality of points arranged in labelled rows and columns, thereby to identify each point in the reference grid. The apparatus has a golf club attachment including an attachment formation for attachment to a shaft of a golf club and an aiming aperture or reticule, wherein the golfer is able to align his eye with one of the points on the reference grid using or through the aiming aperture. The apparatus further has a ball marker and a support stand which supports the ball marker at an elevated position above the ground where the ball is intended to be placed, wherein the golfer is able to align his eye with the ball when placed on the ground using the ball marker. In use, (1) placement of the golfer's feet, (2) alignment of the golfer's eye (and accordingly head) with one of the points on the grid and the golf club using the aiming aperture, and (3) aligning the golfer's eye (and accordingly head) with the ball using the ball marker causes a desired or predictable stance of the golfer.

A method of customizing a golf club, wherein the method includes generating operating data representative of a user operating a mechanical device. The operating data is generated by a first sensor sized and configured to be removably positioned in a mounting port formed on the mechanical device during operation of the mechanical device. The sensor is interchangeably positionable in the mounting port with at least one mass insert, the at least one mass insert being adapted to be interchangeably positioned in the mounting to provide at least two different mass configurations. The method further includes determining a recommended configuration of the at least one mass insert specific to the user based on the operating data generated by the sensor, and transmitting information representative of the recommended mass insert.

Systems and methods are disclosed for generating a 3D avatar using a biomechanical analysis of observed actions with a focus on representing actions through computer-generated 3D avatars. Physical quantities of biomechanical actions can be measured from the observations, and the system can analyze these values, compare them to target or optimal values, and use the observations and known biomechanical capabilities to generate 3D avatars.

Systems and methods are disclosed for generating a 3D avatar using a biomechanical analysis of observed actions with a focus on representing actions through computer-generated 3D avatars. Physical quantities of biomechanical actions can be measured from the observations, and the system can analyze these values, compare them to target or optimal values, and use the observations and known biomechanical capabilities to generate 3D avatars.