An Internet of Thing (IoT) device includes a transceiver coupled to a processor. Blockchain smart contracts can be used with the device to facilitate secure operation.

Technologies are described for aquatic resistance training. An aquatic resistance line may be deployed across the surface of a swimming pool. An aquatic resistance device may be deployed to ride along the resistance line when pulled by a swimmer. The aquatic resistance device comprises offset compression tensioners, each with a wedge-like geometry and a channel for the resistance line. The housing of the aquatic resistance device positions adjacent pairs of the offset compression tensioners into alternating orientation to one another. A mechanical compressor within the aquatic resistance device can force the offset compression tensioners against one another along the axis of the resistance line causing the alternating wedge-like geometries of the offset compression tensioners to force the offset compression tensioners off-axis from one another orthogonal to the aquatic resistance line into a configuration operable to adjustably grip the aquatic resistance line thus providing a resistive training load to the swimmer.

An aquatic exercise apparatus for applying a resistive force to an exercising swimmer, the apparatus includes a bracket mounted to a vertically oriented surface located above a pool of water, a container, an operational assembly comprising at least one upper pulley attached to the bracket and at least one lower pulley attached to the container, a cord passing through the at least one upper pulley and the at least one lower pulley, and a fastener configured to attach to an animal, where the fastener is attached to a free end of the cord, and where pulling the free end of the cord moves the container upward against gravity.

Disclosed is an electronic device capable of automatically identifying a workout environment, such as a swimming pool environment or outdoor environment, based on position-associated information of the electronic device and providing workout information per the workout environment.

An aquatic training aid includes a paddle member for wearing by a swimmer, a variable diaphragm disposed within the paddle member, the variable diaphragm including a plurality of fitted blades arranged to form an aperture, and a housing peripherally framing the plurality of fitted blades. The variable diaphragm is adjustable to change the aperture from a first expanded position to a second contracted position, and hydrodynamic characteristics of the aquatic training aid when moved through water are affected by the change of the aperture. Controlling the aperture enables the swimmer to adjust the resistance provided by the aquatic training aid when it is moved through water.

This invention is embodied by a controlled, variable tension line, payout reel machine. A system of sensors detect line tension and line distance paid out, location, and transmit through wired and unwired communication to a microprocessor. The microprocessor is co-located with the reel structure, which in turn applies, via a brake feature, resistance to the reel which is paying out the line being pulled by the user. This invention pertains to all applications where it is desirable to control the tension in a line paid out from a reel or reel. As stated, the payout motive force is supplied by the person, animal or apparatus attached to the end of the line, opposite the reel. The invention applies to the field of precise and measured control of line tension for sport, sport training, performance testing.

An apparatus and method for measuring a swimmer's speed and conveying the speed to the swimmer in real time includes a plurality of ultrasonic beacons each having a transducer configured to emit ultrasonic signals in a pool or other body of water within which the swimmer is swimming. A wearable, waterproof, ultrasonic receiver worn by the swimmer, receives the ultrasonic signals and generates corresponding signal data. The receiver's microcontroller captures and uses the signal data to calculate the swimmer's position and speed in real time, and conveys this information to a wearable, waterproof, user interface device worn by the swimmer, the user interface device including a near-eye display disposed on the swimmer's googles.

Described herein are methods for determining a target musculoskeletal activity cycle (MSKC) to cardiac cycle (CC) timing relationship. The method may include detecting a signal responsive to a cyclically-varying arterial blood flow at a location on a head of a user; providing a recurrent prompt at a frequency of the heart pump cycle using the signal, such that the signal correlates with a magnitude of blood flow adjacent to the location, and the recurrent prompt is provided to guide the user to time performance of a component of a rhythmic musculoskeletal activity with the recurrent prompt; and guiding the user to adjust a timing of the component of the rhythmic musculoskeletal activity to substantially maximize a magnitude of the signal. In some embodiments, the method further includes generating the recurrent prompt by amplifying the sound generated by the blood flow in or in proximity to an ear of the user.

Disclosed is a water flow control device for swimming training that includes a swimming training device and a main water inlet pipe and a main water outlet pipe. The swimming training device includes at least a swimming pump. The main water inlet pipe and the main water outlet pipe are connected with the swimming pump. The water inlet of the main water inlet pipe is communicated with a swimming pool and a water outlet of the main water outlet pipe is connected with a jet nozzle. A filter device includes at least a filter pump, a filter sterilization device. A filter water inlet pipe and a filter water outlet pipe are connected with the filter pump. The filter water inlet pipe is communicated with the swimming pool through the filter sterilization device and the filter water outlet pipe communicated with the main water inlet pipe.

A water sports nasal guard prevents unwanted contaminated water from entering a user's nostrils. The water sports nasal guard includes a mouth guard, an upper tongue shield, a lower tongue shield, and a nostril shield. The mouth guard allows the user to bite down on the water sports nasal guard, thereby upholding the nostril shield against the nasal passages of the user. The nostril shield presses up against the openings of the user's nasal passages. The mouth guard further includes an arch-shaped body, an upper teeth receptacle, and a lower teeth receptacle. The arch-shaped body positions the upper teeth receptacle and the lower teeth receptacle opposite to each other, both of which accommodate the upper teeth and lower teeth of the user. The upper tongue shield and the lower tongue shield prevent the user's tongue from coming between the teeth of the user and the mouth guard.