Disclosed herein are devices, systems, and methods for officiating, spectating, and scorekeeping for flag football games using one or more wirelessly interconnected electronic devices. In some embodiments, a plurality of graphical user interfaces are provided on a mobile electronic device, the interfaces allowing game officials to create games that are visible to spectators, players, coaches, and statisticians/scorekeepers on a shared geographic map. After spectators, players, coaches, and/or statisticians/scorekeepers join a game, an official inputs information regarding timing and scorekeeping of the game to an interface of a mobile device carried by the official, and the inputted information is broadcasted from the official's device to mobile devices of spectators, players, and coaches, where it is displayed in real-time on graphical user interfaces of the receiving devices. The interfaces may facilitate real-time synchronization of a play-clock and/or go-clock amongst officials, spectators, players, coaches, and/or statisticians/scorekeepers.

A device for measuring physical activity of a user during swimming is provided, which includes the following: a sensor unit adapted and dimensioned to be coupled with swimming goggles, wherein the sensor unit includes a motion circuitry configured to measure physical motion of the user; an optical cardiac activity circuitry configured to be placed at least partially against a body tissue of the user and to measure cardiac activity of the user; and a wireless communication circuitry configured to transfer data between the device and at least one external device, wherein the wireless communication circuitry is configured to transfer physical activity data of the user to the at least one external device, and the physical activity data includes at least one of motion data obtained using the motion circuitry, cardiac activity data obtained using the cardiac activity circuitry.

A treadmill includes a deck, a first pulley disposed in a first portion of the deck, a second pulley disposed in a second portion of the deck, a tread belt surrounding the first pulley and the second pulley, and a platform incorporated into the deck.

An electronic device may comprise audio processing circuitry, pace tracking circuitry, and positioning circuitry. The pace tracking circuitry may be operable to selects songs to be processed for playback, and/or control time stretching applied to such songs, by the audio processing circuitry based on position data generated by the positioning circuitry, a desired tempo, and whether the songs are stored locally or network-accessible. The position data may indicate the pace of a runner during a preceding, determined time interval. The pace tracking circuitry may control the song selection and/or time stretching based on a runner profile data stored in memory of the music device. The profile data may include runner's distance-per-stride data. The electronic device may include sensors operable to function as a pedometer. The pace tracking circuitry may update the distance-per-stride data based on the position data and based on data output by the one or more sensors.

One or more accelerometers embedded with an earbud and/or a set of earphones are able to sense a moving pace of a user. Based on a moving pace of the user, a signal is sent to a remotely connected electronic device. The electronic device is able to separately increase and decrease a beat or rhythm of the audio from the electronic device based on a pace of the user. In some embodiments, an audio alert is sent to the user to inform the user of pace and whether the user has increased or decreased their pace. Additionally, in some embodiments, a program stored on the electronic device is used to compare the user's current progress and/or speed based on past runs and workouts.

A system that wirelessly integrates actual sports equipment with a computer and the internet to allow players remotely located from one another to play a competitive simulated sports game. An individual player may opt to play solo or practice to improve basic techniques. The system includes motion sensors connected to the player and a motion sensing device, all containing circuits and contact or motion sensors coupled with signal processing and radio frequency transmitter circuitry, thereby wirelessly communicate game performance information to a remote receiver-computer. The computer displays player information and visually simulates and controls a game between two players via the internet, having similar equipment and remotely located from each other. Standard sports equipment may be retrofitted with the sensors and associated circuitry to convert such equipment into “smart equipment” for use with the system. The system employs specially developed computer software to process player performance data, control game play, communicate game information between players, generate and control visual simulations and display player performance information.

A multi functional exercise apparatus used for resistance training. An electric digital scale platform will be applied for the user to exercise with resistance bands and determine the resistance in units of pounds or kilograms.

A system and method for timing personal physical activity provides an athlete with the ability to self-time runs over specific distances from anywhere. This can be used for any event that is timed over a specified distance. A software application utilizes the internal hardware commonly provided by many smart devices, such as global positioning system (GPS) modules and accelerometers, to assist the user in tracking and recording the time and distance of a walk/run. The software application is compatible with any smart devices, such as smart phones, smart watches, and a variety of other smart wearables. In addition, GPS is utilized to track and record the distance travelled by the user. The software application also uses a stopwatch-like mechanism in order to track and record the duration of an exercise. Furthermore, the GPS distance tracker and the stopwatch-like timer may be used together to create a pacemaker/pacesetter for the user.

A media-playback device includes: a media-output device that plays media content items; a physiological measurement device programmed to measure at least one physiological measurement of a user of the media-output device; and a physiological control engine configured to: identify a current physiological measurement for the user; and cause the media-output device to modify playback of the media content items based upon the current physiological measurement.

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.