A system and method for two swimmer wings designed using biomimicry and inspired by winged creatures/birds of flight as well as the fore flippers of a sea turtle. The swimmer wings are designed for users to traverse long distances instead of relying on personal watercrafts or boats to not only help sustain the environment by reducing the carbon footprint but also provide physical exercise to improve the user's well-being. The swimmer wings include a board, an arm guard which shields the user's forearm, and arm fasteners that secure the user's forearm between the board and the arm guard.

A golf club head includes a first portion joined to a second portion to at least partially define an interior club head volume. The first portion includes a wall defining an outer boundary of the club head volume, and a support rib extending from the wall to operatively stiffen the first portion. The second portion of the golf club head can engage the support rib, and the support rib can be adhered to the second portion to join the first portion and the second portion.

An exercise apparatus includes: a support track including a first channel on a first side, a second channel on a second side, and a row of fixation holes, the first channel, the second channel, and the row of fixation holes being parallel to each other; a carriage including a carriage frame, a pin rod, a first side roller, and a second side roller, wherein: the pin rod is coupled to the carriage frame and positioned to be removably inserted into at least one of the fixation holes to fix a position of the carriage with respect to the support track, the first side roller is coupled to the carriage frame and positioned within the first channel, and the second side roller is coupled to the carriage frame and positioned within the second channel; and at least one support bar affixed to the carriage.

Representative embodiments of the present technology may include a ball bat with a handle, a barrel attached to or continuous with the handle along a longitudinal axis of the bat, and a reduced-durability region positioned in the barrel. The reduced-durability region may include two adjacent stacks of composite laminate plies, wherein the stacks are spaced apart from each other along the longitudinal axis to form a first gap therebetween. A separation ply may be positioned in the first gap between the stacks. The separation ply may include a non-woven mat material. At least one cap ply element may be positioned around an end of one of the stacks. In some embodiments, an axis of the first gap is oriented at an oblique angle relative to the longitudinal axis of the bat.

Wood-type golf clubs and/or golf club heads include: (a) a golf club head base member including a face member having a ball striking face; and (b) a polymeric body member engaged with the golf club head base member, wherein the polymeric body member is formed via a rotational molding process (or other centrifugal force inducing molding process) and/or engaged with the golf club head base member via a rotational molding process (or other centrifugal force inducing molding process). The polymeric body member forms at least a portion of a crown member of the club head in some structures.

A hollow wall composite tube for improving performance in sports shafts and lightweight structural members is disclosed that includes: a constituent tube, for forming the wall, that comprises: a flexible core component, for providing an adjustable shape on which to wind or braid filaments or fabric; and an adjustable shape hollow structure, for reducing weight, providing a path for the core to be evacuated, tightly conformed to the core, and tow, braid filaments or fabric, for providing a reinforcing fiber matrix for saturation with epoxy, spirally wrapped, applied or braided on the constituent tube. Methods of producing contemplated composite tubes are also disclosed.

A resistance mechanism for an exercising device is provided. In one embodiment, the resistance mechanism comprises at least one flywheel. The resistance mechanism may also comprise at least one resistance index wedge configured to engage with the at least one flywheel. The resistance mechanism may also comprise a resistance adjustment mechanism connected to the resistance index wedge and configured to alter a resistance provided to the exercise device by increasing pressure provided by the at least one resistance index wedge to the at least one fly wheel assembly, wherein the resistance mechanism is configured to operate in an outdoor environment.

A golf club head that is capable improving on the inertia properties of a golf club head all while also improving the Center of Gravity (CG) location is disclosed herein. More specifically, the golf club head in accordance with the present invention achieves a relative low Moment of Inertia (MOI) about the Z-axis (MOI-Z) as well as a relatively low MOI about the Shaft-axis (MOI-SA).

A ball net structure arranged to be portable, collapsible, and able to be configured into different arrangements for different nets and/or different sports-related activities. The ball net structure comprising a base structure including at least one support portion, at least one base extension, and at least one base extension hinge, wherein the at least one support portion and the at least one base extension are coupled to the at least one base extension hinge. At least one rod is removably coupled to the base structure and received by a net, wherein the net is adapted to exert a force on the at least one rod causing the at least one rod to exert a force onto said base structure.

A golf club may include a head having a body and a faceplate coupled to the body. The faceplate may have a maximum thickness at a central location and a cross-section intersecting the central location. The cross-section may have continuously variable wall thickness across the faceplate. The faceplate may have a closed non-convex contour curve defined by constant faceplate wall thickness that encloses the central location.