A method and system of predicting a muscle characteristic using ultrasound. The characteristic may include a tenderness characteristic and/or a strength characteristic. An analysis of muscle structure is performed for a sample using ultrasound data of the sample. The analysis may include determining a relative number of bundles, fascicles, sarcomeres, fibers, and/or sheath thickness from the ultrasound data. Thereafter, the muscle characteristic is predicted for the sample based on the analysis.

An apparatus and method to evaluate the endurance of a muscle group of a user by measuring velocities of an engagement assembly coupled to a resistance element and moved by the user through a plurality of exercise strokes. A muscle group is assessed by determining a rate of fatigue for the muscle group. The method can include adjusting the controllable resistance to a resistance level, monitoring the movement of the engagement assembly against the resistance level over a plurality of repetitions, determining a relationship between the movement of the engagement assembly by the user over the plurality of repetitions, and using the relationship to determine the rate of fatigue.

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.

Computational approaches to assess CNS functionality using a digital tablet and stylus are provided.

The present disclosure relates to a respiratory system for exercising and analysing respiration of a subject comprising: a breathing unit comprising: a mouthpiece connected to: at least one inhalation air way, at least one exhalation air way, and an electronic sensor unit comprising at least one pressure gauge for measuring air pressure in the mouthpiece, and a processing unit for collecting/storing and/or transmitting air pressure data.

A system for monitoring muscle load, is configured to perform operations including: obtaining, from at least one sensor, measurement data on an exerciser; determining, based on the measurement data, a number of repetitions of a macroscopic movement performed during a physical exercise; determining, based on a conversion entry corresponding to a type of the physical exercise, muscle load coefficient of one or more muscles loaded in the physical exercise; utilizing the muscle load coefficient of the one or more muscles and the number of repetitions in determining muscle load data indicating muscle specific muscle load caused by the physical exercise performed by the exerciser; and outputting the muscle load data.

Disclosed is an extensible electrode array (102) for accurately locating a pelvic floor muscle, and its design method and an extensible pelvic floor electrode. The design method includes: (1) obtaining a three-dimensional muscle anatomy map of a pelvic floor muscle, dividing a muscle according to the three-dimensional muscle anatomy map and determining a muscle fiber trend, and for each muscle, determining a plurality of three-dimensional coordinate points for marking each muscle along the muscle fiber trend (S101); (2) after projecting all three-dimensional coordinate projects onto a two-dimensional plane unfolded in a shape of an elastic cavity (101), taking each two-dimensional coordinate point in the two-dimensional plane as a location to dispose an electrode plate (S102); (3) simulating a mechanical property of the elastic cavity (101), and determining a deformation rate of an extensible electrode wire (105) of the electrode plate when the extensible electrode wire (105) of the electrode plate is arranged along a muscle fiber direction of the pelvic floor muscle (S103); and (4) according to a design result, mounting the electrode plate and the extensible electrode wire (105) on the elastic cavity (101) to form the extensible electrode array (102) (S104). The design method enables each electrode plate to locate the pelvic floor muscle before and after expansion, thereby improving accuracy in collecting a myoelectric signal of the pelvic floor muscle.

A device for measuring contractions and/or relaxation of one or more muscles of a body cavity, the device having a hollow body which is for positioning in the body cavity and which is covered by a coating made of or having a biocompatible material, the body being formed of two half-shells which are each physically connected, permanently and continuously during the use of the device, with the aid of non-compressible or deformable connecting means, to at least one pressure sensor, or part of the pressure sensor, arranged in the body. Also, a method for measuring the contraction and/or relaxation of the muscles of a body cavity, a method for monitoring the contractions and/or relaxation of the muscles, and a method for exercising these muscles.

A method of monitoring a subject for the risk of Acute Mountain Sickness (AMS) includes obtaining real-time pulse arterial oxygen saturation (SpO.sub.2) measurements from the subject. The SpO.sub.2 measurements are transformed into a novel metric known as Accumulated Hypoxic Debt (AHD). The AHD metric is used as the independent variable in a longitudinal generalized linear mixed model to calculate the probability D that the subject is at risk of AMS. Based on the probability D, appropriate courses of action may be communicated to the subject via the output device of a wearable or portable monitor.

A method of monitoring a subject for the risk of Acute Mountain Sickness (AMS) includes obtaining real-time pulse arterial oxygen saturation (SpO.sub.2) measurements from the subject. The SpO.sub.2 measurements are transformed into a novel metric known as Accumulated Hypoxic Debt (AHD). The AHD metric is used as the independent variable in a longitudinal generalized linear mixed model to calculate the probability D that the subject is at risk of AMS. Based on the probability D, appropriate courses of action may be communicated to the subject via the output device of a wearable or portable monitor.