The present inventions, in one aspect, are directed to systems and circuitry for and/or methods of establishing communication having one or more pairing facilitator-intermediary devices (for example, a network connected server) to enable or facilitate pairing and/or registering at least two devices (e.g., (i) a portable biometric monitoring device and (ii) a smartphone, laptop and/or tablet) to, for example, recognize, interact and/or enable interoperability between such devices. The pairing facilitator-intermediary device may responsively communicates information to one or more of the devices (to be paired or registered) which, in response, enable or facilitate such devices to pair or register. The present inventions may be advantageous where one or both of the devices to be paired or registered is/are not configured (e.g., include a user interface or certain communication circuitry that is configured or includes functionality) to pair devices without use of a facilitator-intermediary device.

The present invention is disclosing a performance improvement system comprising a smart athletic flexible accessory and an electronic device communicably coupled with smart athletic flexible accessory. Smart athletic flexible accessory comprises a plurality of fabric sensors configured to measure data associated with a physical activity performed by a user and a first transceiver configured to transmit measured data. Electronic device comprises a second transceiver configured to receive measured data from smart athletic flexible accessory, and a microprocessor. Microprocessor is configured to analyze received data from receiver, generate a recommendation based on analyzed data, and cause a display screen to display generated recommendation.

Measuring muscle load in athletic activities, and associated systems and methods are described herein. In an embodiment, a method for monitoring muscle load of an athlete includes: determining a muscle effort (ME) of the athlete by a wearable electromyography (EMG) sensor, and determining at least one inertial measurement unit (IMU) output of the athlete. The method further includes comparing the ME and the IMU output of the athlete, and, based on comparing, determining a performance of the athlete.

The present invention relates to a method of determining metabolic parameters of one or several muscular motor units by coupling muscular response to ventilatory response of a subject, comprising, from a step of performing efforts (i) using a test device by the subject moving on the test device; (ii)-a step of instantaneously measuring the movement speed of one or several muscular motor units of the subject v(t), and the oxygen flow rate φ.sub.O2t); (iii)-a step of plotting the COT curve of the oxygen flow rate of the subject against the movement speed of one or several muscular motor units of the subject v(t), (iv)-a step of determining the following metabolic parameters from the COT curve: Basal power B which is the vertical asymptote at the origin, Flow resistance R.sub.M which is the oblique asymptote at high intensities.

During a first time period and for a first user, a second user is automatically selected based on competitive data of the first user and competitive data of the second user, and a workout selection is sent to cause a video of a workout to be displayed during a second time period on a smart mirror of the first user and a smart mirror of the second user. During the second time period, a live stream of the first user exercising is displayed at the smart mirror of the second user, and a live stream of the second user exercising is received and displayed at the smart mirror of the first user. During the second time period, a performance score of the first user and a performance score of the second user is displayed at the smart mirrors of the first user and the second user.

This disclosure provides a method for determining tiredness of a user, which utilizes heart rate measurements, speed measurements and a plurality of predetermined parameters to determine whether the user is exercising and to determine how tired the user is if the user is determined to be exercising. A notification is outputted when it is determined that the user is tired.

Aspects relate to systems, methods, and apparatuses relating to a portable device that may be used to identify a critical intensity and an anaerobic work capacity of an individual. The device may utilize muscle oxygen sensor data, speed data, or power data. The device may utilize data from multiple exercise sessions, or may utilize data from a single exercise session. The device may additionally estimate a critical intensity from a previous race time input from a user.

An apparatus and method for monitoring, assessing and managing an individual's functional state to allow the individual to reach and maintain optimized functional state based on customized guidance using as few as two to three functional state tests.

A biofeedback rehabilitation display for gait training visible to the subject including a plurality of foot placement targets visible to the subject on the display and moving along the display at a speed proportional to the desired gait speed of the subject and in a direction along the display representative of the direction of locomotion of the subject; a pair of subject foot icons visible to the subject illustrating real-time foot positioning of the subject throughout the gait pattern of the subject, wherein the foot icons distinguish between stance phase and swing phase throughout the gait pattern of the subject; and at least one real-time proximity measurement visible to the subject for each stance phase providing the subject with an indication of the proximity of each stance phase of each foot with an intended foot placement target.

During a first time period and for a first user, a second user is automatically selected based on competitive data of the first user and competitive data of the second user, and a workout selection is sent to cause a video of a workout to be displayed during a second time period on a smart mirror of the first user and a smart mirror of the second user. During the second time period, a live stream of the first user exercising is displayed at the smart mirror of the second user, and a live stream of the second user exercising is received and displayed at the smart mirror of the first user. During the second time period, a performance score of the first user and a performance score of the second user is displayed at the smart mirrors of the first user and the second user.