Golf putting training devices are disclosed that include a body portion and a shaft attachment piece. The shaft attachment piece is connected to the body portion and is configured to attach the golf putting training device to a shaft of a putter. The golf putting training devices further include a shaft indicator surface, which is configured to rest adjacent to and along the shaft of the putter. In addition, the golf putting training devices include a sight alignment shield, which is connected to the body portion and is configured to be positioned perpendicular to the shaft indicator surface.

A system that measures a swing of a bat with one or more sensors and analyzes sensor data to create swing quality metrics. Metrics may include for example rotational acceleration, on-plane efficiency, and body-bat connection. Rotational acceleration measures the centripetal acceleration of the bat along the bat's longitudinal axis at a point early in the rotational part of the swing; it is an indicator of the swing's power. On-plane efficiency measures how much of the bat's angular velocity occurs around the swing plane, the plane spanned by the bat and the bat's sweet spot velocity at impact. Body-bat connection measures the angle between the bat and the body tilt axis, which is estimated from the trajectory of the hand position on the bat through the swing; an ideal bat-body connection is near 90 degrees. These three swing quality metrics provide a simple and useful characterization of the swing mechanics.

The present disclosure relates to systems and methods for balance index determination. For example, a wearable apparatus may have at least one gyroscope configured to measure angular velocity about a first axis; at least one inertial measurement device (IMU) configured to measure deviation along a second axis and a third axis; at least one memory storing instructions; and at least one processor configured to execute the instructions to: receive angular velocity measurements over a period of time from the at least one gyroscope; receive deviations from the second axis and from the third axis over the period of time from the at least one IMU; weight the deviations based on directions associated with the deviations; and generate a composite balance index based on the angular velocity measurements, the weighted deviations from the second axis, and the weighted deviations from the third axis.

The present invention relates to a golf club headpad which is used while being attached to the head and the head face of a golf club and comprises an elastic face plate corresponding to the head face part, wherein the face plate has horizontal anti-grooves horizontally formed thereon and protruding at regular intervals, and vertical anti-grooves vertically formed thereon and protruding at regular intervals on both end portions of the horizontal anti-grooves. The present invention relates to a golf club headpad, made of a rubber-based material, which covers the head of a golf club or is attached to the head face such that an amateur golfer can reduce an impact between the golf club and a golf ball and increase a back spin of the golf ball, thereby increasing a flight distance of the golf ball in addition to reducing a hook and slice of the golf ball.

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 golf club head has a body defining a ball striking face. The body further has a first leg extending away from the ball striking face and a second leg extending away from the ball striking face wherein a void is defined between the first leg and the second leg. The body further defines a cover that extends over the void. The golf club head may further have support structures and adjustable weight members.

A golf putter training tool having a putter mounting base on top of an artificial green connected through a slot to a linear putting guide located beneath the artificial green. A golfer engages putter mounting base with a golf club, which is held in place by a friction or interference fit next to or on a sponge-like or rubber-like material. Practice shots made on the tool are constrained to be linear back-and-forth by linear putting guide. This constraint helps the golfer develop muscle memory for correctly aiming a put. Putter mounting base has an alignment guide against which the face of the golf club rests, constraining the face of the golf club square to the ball when the golfer makes the stroke. This constraint helps of golfer develop muscle memory for hitting the ball squarely. The tool has accessories such as a gravity ball feed mechanism.

A system that wirelessly integrates actual sports equipment with a computer and the internet to allow players remotely located from one another to play a competitive simulated sports game.

A golf club comprising a golf club head having a face wall, an inertial motion unit (IMU) positioned within the body, and a transceiver in communication with the IMU, a shaft attached to the golf club head, and a grip attached to the shaft is disclosed herein. The IMU identifies an impact location with a golf ball.

Embodiments herein describe a wristband for securing a smart electronic wrist device to the human subject. A heart rate sensor, coupled to the wristband of one embodiment, attaches to the human subject, and to generate electronic signals responsive to the heart rate of the human subject. An analog to digital signal converting circuit (ADC), electronically coupled to the heart rate sensor, to receive electrical signals generated by the heart rate sensor. A digital signal encoding circuit, electronically coupled to the ADC, to convert the electrical signals to data signals. A wireless communication interface to transmit the digital signals wirelessly to a handheld phone call device. The handheld cellular device includes a physiological processor for analysis of the data signals concerning the heart rate of the human subject.