Some disclosed golf club heads include body having at least one raised sole portion and a cantilevered ledge extending down around a perimeter of the club head below the level of the raised sole portion. Some disclosed golf club heads include one or more sole openings in the body and a sole insert that is mounted inside the body over the sole openings. The sole can include weight tracks as well, and a rear weight track can extend between a toe side sole opening and a heel side sole opening. A crown insert can also be included that is mounted over an upper opening in the body.

A golf skill training system includes two armbands to be securely wrapped around the upper arms of the golf player, where the two armbands are either linked to each other by an elastic band, or separately linked by two elastic bands to the player's torso at chest height. Sensors are provided on the elastic band or bands to measure the amount of stretch in each band. During a golf swing, the elastic band or bands may become stretched, and the amounts of stretch measured by the sensors serve to indicate whether the two arms are too far apart from each other or one or both arms are too far from the torso during the swing. Additional elastic bands with sensors may be provided. The golf skill training system further includes movement sensors attached to the player's waist and knees to measure the rotation and movement speed of these parts of the body. The data sensed by the armband sensors, the waist sensors and/or the knee sensors during a swing are synchronized and analyzed to determine the quality of the movements. The analyses may be performed in real time to provide feedback to the player. Wearable vibration devices may be integrated with the movement sensors or separately provided to communicate the feedback information to the player.

An alternate reality training system for tennis is operationally coupled to a head assembly, a stand assembly, and a vertical polymer flexible rod assembly connecting the substantially polymer head assembly to the stand assembly. The vertical polymer flexible rod assembly oscillates when a ball member held in the head assembly is hit by a racket. An alternate reality software system is adapted to synchronize with oscillations to present substantially simultaneous cues for hitting a physical ball member coupled to the head member and convert associated data to a virtual ball member adapted to visually present data from hitting the physical ball member and associated user data. Data includes variables of power, accuracy, timing, trajectory, spin, and impact sweet spot from which to calculate virtual ball flight.

Golf clubs have a primary alignment feature including a paint or masking line which delineates the transition between at least a first portion of the crown having an area of contrasting shade or color with the shade or color of the face. Some have a primary alignment feature including a paint or masking line which delineates the transition between a first portion of the crown having an area of contrasting shade or color and the area of shade or color of the face. A secondary alignment feature includes a paint or masking line that delineates the transition between the first portion of the crown having an area of contrasting shade or color with the shade or color of the face and a second portion of the crown having an area of contrasting shade or color with the shade or color of the first portion.

The systems and methods described herein provide an exercise machine that includes a closed loop control system to enhance or otherwise modify operations of the exercise machine. For example, the system may apply various closed loop control schemes based on data received from various sensors of the exercise machine, such as sensors with handles and/or motors of the exercise machine.

Example methods, apparatuses, and/or articles of manufacture are disclosed herein that may be utilized, in whole or in part, to facilitate and/or support one or more operations and/or techniques for computer vision and artificial intelligence applications, such as implemented, in whole or in part, for performance evaluation and/or skills development.

A spherical structure having a raised texture includes a sphere and a plurality of protruding bumps. The plurality of protruding bumps are formed in pairs and in a curved arrangement on a surface of the sphere. A protruding strip that is curved is formed on the surface of the sphere, and the plurality of protruding bumps are arranged in pairs on the protruding strip on the surface of the sphere.

An aerial yoga smart system and a method of aerial smart yoga include a hammock having at least seven fabric sections comprising at least six grip sections and at least one center section, attached in two positions and configured to hang freely downward from the at least two support cables. The center section is connected to the two positions, and a first three grip sections is connected to a first position of the two positions and a second three grip sections is connected to a second position of the two positions. Each grip section has an end connected to one or more grips.

A practice aid system includes: a practice aid device; a hoop sensor system, including first and second pairs of an optical transmitter and receiver, which are mountable on a rim of a basketball hoop; an intelligent ball, including an inflatable ball body, a ball control unit, a ball light source, and a ball motion and location sensor; an intelligent shoe, including a shoe body, a shoe control unit, a shoe motion and location sensor, a vibrator, and a shoe light source.

A free-standing A-frame exercise equipment cabinet comprising a first portion of the free-standing A-frame exercise equipment cabinet configured to removably house first exercise weight plates of a plurality of different sizes and a plurality of different weights. A second portion of the cabinet is configured to house a computer screen display. A third portion of the cabinet is configured to house at least one camera, one or more processors, and memory storing instructions that, when executed by the one or more processors, cause the cabinet to present a display on the computer screen display housed in the second portion of the cabinet. A fourth portion of the cabinet is configured to removably house at least one barbell and a plurality of dumbbells. A fifth portion of the cabinet comprises four legs of the cabinet that allow the cabinet to stand upright without additional support.