An apparatus and method for swim training are disclosed herein. In one embodiment, a cable is secure to a starting block or other fixed object at or near the edge of a pool, and the cable is then extended into the pool. The cable includes, along its length, fixed securement points to which multiple swimmers may be secured, via belts worn by the swimmers, to the cable. Because the swimmers are secured to fixed positions along the cable, multiple swimmers may swim in the same lane without interfering with each other. In another embodiment, the cable may be secured at both ends of the pool.

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.

A construction kit of modular components including rigid and flexible foam bars with endcaps designed to be joined together by snap-fit connections to define three-dimensional, adult-sized playing fields which float in aquatic settings such as swimming pools. The connectivity of the modular components is characterized by manual assembly, a high resistance to separation during active play by teams of adults participating in vigorous athletic activities, and tool-assisted disassembly.

A monofin swimming device comprising a skeleton and an outer shell, wherein the combination attaches to a user's feet to assist in propelling the user through the water.

An exercise apparatus may include a rectangular platform, first and second attachment points, first and second rails and friction reducing runners on the rails. The platform may have an upper face, a lower face, two long edges and two short edges. The first attachment point may be disposed along one of the long edges. The second attachment point may be disposed along the other of the long edges. The first rail may be attached to the lower face of the platform proximal to one of the short edges of the platform. The second rail may be attached to the lower face of the platform proximal to the other of the short edges of the platform. The first and second rails may be spaced apart to define a passageway beneath the apparatus, wherein the passageway is configured to allow the apparatus to pass over a standard sprinter's starting block without contacting any part of the starting block.

A helmet configured to protect a human head against mild traumatic brain injury upon impact includes an outer shell and a liner consisting of fluid fillable flexible fluid chambers fluidly connected to each other by fluid connections. The fluid chambers being spaced around the circumference of the helmet and configured to fill a space between the head and the outer shell when the helmet is positioned on the head. Impact resistant flexible pads are also in the liner and are spaced around an inner circumference of the outer shell adjacent to each of the fluid fillable flexible fluid chambers. A flexible inner shell inside the liner is configured to fit closely on the head. The flexible fluid chambers are configured to compress in response to impacting of the helmet on an impact side and to force liquids through the fluid connections to inflate other fluid chambers inside the helmet thereby cushioning the head against a rebound impact on the inside of the helmet.

A swimming timer including a fluid container, a fluid channel, a fluid sensor, a control circuit board and a display device. The fluid channel is connected to the fluid container and the fluid sensor, and the control circuit board is wired with the fluid sensor and the display device. The fluid container is installed and mounted on a side-wall of a swimming lane. When a swimmer starts, turns and stops, the fluid container will be touched and compressed forcing the fluid inside to flow into the fluid channel. The fluid sensor detects the fluid flow and generates electronic signals accordingly for the control circuit board and the built-in timing and stopwatch program to use as the input commands of start, lap and stop to compute the swimming time and the number of swimming laps. The display device is to show the results for the swimmer reference.

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

Techniques for automatic tracking of user data for exercises are disclosed. In one aspect, a method of operating a wearable device may involve determining that a user of the wearable device has started an exercise, activating the GPS receiver in response to determining that the user has started the exercise, and detecting a time at which the GPS receiver achieves an initial GPS fix of a location of the wearable device. The method may further involve logging, based on output of the one or more biometric sensors, a first set of user data during a first time interval between the start of the exercise and the detected time of the initial GPS fix, and back-filling an exercise route of the user during the first time interval based on the first set of user data.

There is provided an apparatus, wherein the apparatus is configured to perform operations comprising: obtaining heading information indicating a target heading to a target; detecting, during swimming, that the swimmer deviates from the target heading; and informing the swimmer, via a user interface element, that the swimmer has deviated from the target heading.