Aspects of the present disclosure involve hydraulic systems and methods for altering a flow of a body of water, such as a river, channel, and/or other flowing or uncontained bodies of water. In one aspect, a hydraulic system provides a velocity barrier for the impedance of aquatic organism migration. More particularly, the velocity barrier may be adapted based on the swimming capabilities of one or more aquatic organisms to impede migration. The aquatic organism may be one or more species of fish, such as species sea lamprey (Petromyzon marinus). The example implementations shown and described herein reference the restriction of the sea lamprey. However, it will be appreciated that other aquatic organisms could be restricted by the presently disclosed technology, for example, with different hydraulic targets depending on swimming capabilities.

A system and method for displaying surf training instructional information is used to improve a user's pop-up, as it relates to popping up on a surfboard, and improving one's surf fitness. The visual illustrations indicates the position of a surfer's hands, their body when lying on their surfboard and/or where their feet should land when they pop-up into their surfing stance on a surfboard, which can engraved, drawn or painted onto a surface of any type. The system and method also has visual instructional guidelines for performing exercises and stretches that can be done to improve a user's surf strength, balance, flexibility and endurance. By using this system and method a user will improve their pop-up (jump) and overall surf fitness in order to become a better surfer.

An apparatus comprises a wave generator configured to move water on a front side of the wave generator to generate a surfable wave and a displacer configured to move in synchronization with the wave generator, the displacer to displace water on a back side of the wave generator to compensate for water elevation changes on the back side of the wave generator that would occur in the absence of the displacer.

A wave generating system comprising: a semi-submerged water displacement hull adapted to travel along a travel path within a wave pool, thereby generating a wake; and a wake modulator adapted to modulate the wake; wherein at least one of the travel path of the hull relative to the wake modulator and the travel of the wave modulator relative to the wake generated by the hull is controlled to effect the modulation of the wake.

Method of using a snowboard training apparatus for transferring the feel of toe side and heel side of a snowboard from an instructor to a snowboard learner is disclosed. The training apparatus includes a training rod having a first and second end. The first end and second end of the training rod can be adapted to be supported by a snowboarder's leg, snowboarder's boot, snowboard's bindings or a snowboard itself. The training apparatus can also include a second training rod.

A motion sensor package with an elastomer layer that encases the sensor electronics, including the sensors, a processor, an antenna, and a battery. The elastomer layer may provide shock isolation and water resistance to protect the enclosed electronics. Embodiments may also include an outer housing into which the elastomer encased package is installed. The outer housing may for example comprise two cylindrical sections that screw together to close the outer housing. In one or more embodiments part of the outer housing may be integrated into an item of sports equipment. Embodiments for golf may also include a golf club grip adapter that is inserted into the top of a grip, and which attaches to the outer housing containing the elastomer enclosed sensor package.

The invention discloses a system for forming an artificial wave (W) in a water environment, which comprises a pulling apparatus (6), a pulled apparatus (10, 10a, 10b, 10c, 10d) and a pulling arrangement (11), wherein the pulling apparatus (6) comprises a power pack (12) and the pulled apparatus (10) comprises a wave-forming profile (13), wherein the pulling arrangement (11) comprises at least two pulleys (14, 15) and at least one rope or line (16) provided at or via both ends of the pulled apparatus (10) and further via the pulleys (14, 15) for providing the movement of the pulled apparatus (10) between a first pulley (14) and a second pulley (15). According to the invention, the wave-forming profile (13) comprises at least two wings (1, 2), of which at least one wing (1, 2) is mainly transverse relative to the direction of advancement (A) of the pulled apparatus (10, 10a, 10b, 10c, 10d).

Method for coupling a sensor to a piece of equipment, such as a golf club, baseball bat, or tennis racket, that ensures that the sensor is in a known position and orientation relative to the equipment. Compensates and calibrates for degrees of freedom introduced in manufacturing and installation. The method may include manufacturing a sensor receiver that aligns with equipment in a fixed orientation, and that holds a sensor housing in a fixed orientation relative to the receiver. Remaining uncertainties in sensor position and orientation may be addressed using post-installation calibration. Calibration may include performing specific calibration movements with the equipment and analyzing the sensor data collected during these calibration movements.

Disclosed embodiments include an articulated plow that displaces water within a pool to create water wave energy. The articulated plow may include blades that are vertically engaged and coplanar during a wave energy stroke, thereby forcing water in front of the plow to be displaced. During the wave energy stroke, the static water plane behind the plow may be maintained at a predetermined elevation thereby promoting equilibrium in hydrostatic pressure in front of and behind the plow, resulting in less force required during the plow reciprocation. During a reset stroke, the blades may rotate through their respective centroidal axis simultaneously to a horizontal attitude, thereby gliding through the static water without creating turbulence. Disclosed embodiments may be used to create a nature-like board surfing experience when combined with a downstream reef option and a downstream inclined pool floor.

A balance trainer set including an inflatable balance board and an inflatable balance roller are disclosed. The inflatable balance board may have a flat, or slightly curved profile taken along a longitudinal centerline and/or a lateral centerline.