A system that measures a swing of equipment (such as a bat or golf club) with inertial sensors, and analyzes sensor data to create a rotational profile. Swing analysis may use a two-lever model, with a body lever from the center of rotation to the hands, and an equipment lever from the hands to the sweet spot of the equipment. The rotational profile may include graphs of rates of change of the angle of the body lever and of the relative angle between the body lever and the equipment lever, and a graph of the centripetal acceleration of the equipment. These three graphs may provide insight into players' relative performance. The timing and sequencing of swing stages may be analyzed by partitioning the swing into four phases: load, accelerate, peak, and transfer. Swing metrics may be calculated from the centripetal acceleration curve and the equipment/body rotation rate curves.

A training device can easily be affixed or mounted to the hitting face of a golf club. The training device may provide auditory, tactile, and directional feedback for the user during practice so that he/she may learn how to strike the ball consistently on the sweet spot. A training device may include several raised surfaces of varying shapes rising from the base surrounding an aperture centered over the sweet spot of the golf club and larger than the surface area contacted by the ball. Use of the training device may reduce the user's variance from the “sweet spot” due to a strike not only along the longitudinal axis but also along the vertical axis. The user avoids impingement with the raised surfaces of the training device by striking the ball within a pre-set tolerance as well as within the boundaries of the aperture.

A golf club fitting apparatus for helping with golf club alignment is provided. The golf club fitting apparatus may be attached to a golf club and provide fitting information including effective lie angle and effective loft angle. A leveler body is disposed at a predetermined angle relative to a shaft axis of the golf club so as to rest in a neutral position when the golf club is in a normal address position.

A golf putting swing training aid that may be attached to any golf club that may force a golfer's hands into the proper grip position for various types of golf putting shots is provided. The device and methods of the present disclosure may further allow a golfer to practice these shots to build muscle memory and to ingrain the proper grip and form positions into memory to allow for repeated and consistent shot performance.

The present invention provides a putting guide capable of correcting a posture when putting, checking a contact angle between a putter and a golf ball, correcting a posture of an exerciser during a putting practice, and checking a focusing point that the exerciser watches.

The putting guide for putting practice includes a hitting part, a rod part connected to the hitting part, and a front part formed on an end of the rod part.

A putting practice apparatus for evaluating the striking speed and tempo of a putter includes: an emitting unit (100) that emits light and is provided in a first sensor installation part; a light receiving unit (200) that receives the light emitted from the emitting unit (100); a speed detecting unit (300) and a position measuring unit (400) which respectively detect the speed and measure the position of the golf ball (1); a calculation control unit (500) for performing calculations in order to detect the initial position value of the golf ball (1) as measured by the position measuring unit (400) and the movement speed (Vb) and the moving distance (Hb) of the golf ball (1) as measured by the speed detecting unit (300); and a storage unit (600) for storing the measured speed (Vb) and the measured distance (Hb) of the golf ball (1).

A golf putting swing training aid that may be attached to any golf club that may force a golfer's hands into the proper grip position for various types of golf putting shots is provided. The device and methods of the present disclosure may further allow a golfer to practice these shots to build muscle memory and to ingrain the proper grip and form positions into memory to allow for repeated and consistent shot performance.

A golf club fitting apparatus and a grip for helping with golf club alignment are provided. The golf club fitting apparatus may be attached to a golf club and provide fitting information including effective lie angle and effective loft angle. An angle indicator is disposed at a predetermined angle relative to a shaft axis of the golf club so as to rest in a neutral position when the golf club is in a normal address position. A grip is provided that may be attached to a golf club shaft such that a butt end and/or distal end of the grip have a surface that helps with golf club alignment. A grip is provided with a front portion having edges that help with golf club alignment.

A portable magnification angle adjuster for golf putting is proposed. More particularly, in the portable magnification angle adjuster for golf putting, the decrease of the beauty and portability of the magnification angle adjuster due to the protruding of the knob from the casing during the rotation of a knob for the rectilinear movement of a rotation weight is prevented, and the range of the engagement of threads formed to move the rotation weight is limited such that the moving distance of the rotation weight is limited. To this end, the portable magnification angle adjuster includes: a casing; an indication hand; a knob; and a dial; and a rotation weight.

An improved golf putter head with a multidirectional roller ball is disclosed. The golf putter head can comprise a base, a first ball housing within the base, and a first roller ball. The base can comprise a crown, a sole, a face for hitting a golf ball, and an insert housing. The sole can comprise a first bottom orifice. The first roller ball can be mounted within the first ball housing and can extend through the first bottom orifice. The ball can be capable of rolling freely in any direction within the first ball housing.