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.

A method of treating a human subject which is effected by intermittent inhalation of gaseous nitric oxide at a concentration of at least 160 ppm is disclosed. The method can be utilized for treating a human subject suffering from, or prone to suffer from, a disease or disorder that is manifested in the respiratory tract, or from a disease or disorder that can be treated via the respiratory tract. The disclosed method can be effected while monitoring one or more of on-site and off-site parameters such as vital signs, methemoglobin levels, pulmonary function parameters, blood chemistry and hematological parameters, blood coagulation parameters, inflammatory marker levels, liver and kidney function parameters and vascular endothelial activation parameters, such that no substantial deviation from a baseline in seen in one or more of the monitored parameters.

Some embodiments are directed to a self-contained breathing mask for measuring and monitoring the breath of a human subject. The mask may be lightweight, self-contained, and physically untethered to any test or measurement equipment, providing the subject full mobility, and allowing him/her to perform almost any daily activity during use. The mask may include integrated sensors for measuring properties of the subject's breath, over any length of time, providing respiratory information like breath count, rate and volume, oxygen consumption, and carbon dioxide production, as well as various biometric information.

The present invention discloses a method for determining an injury risk of a user who has performed an exercise training for a first duration. Divide the first duration into a plurality of time segments. Determine the training load in each of the plurality of time segments. A first portion of the training load is above a threshold of an exercise intensity adjusted according to a fitness condition of the user. Perform an algorithm to determine an indication mode representing a training condition of the exercise training of the user in the first duration based on the training load. Determine a criterion of the injury risk based on the first portion of the training load and the algorithm. Determine the injury risk of the user based on a comparison between the indication mode and the criterion of the injury risk.

A system for monitoring nutritional intake is described. The system includes a wearable housing configured for releasable attachment to a user; a biosensor supported by the wearable housing for disposition adjacent to a blood vessel; the biosensor configured to collect pulse profile data; an output device; and a processing circuit connected to the biosensor and the output device. The processing circuit is configured to: receive the pulse profile data from the biosensor; generate a nutritional intake value from the received pulse profile data; and control an output device to output the nutritional intake value.

The present invention describes an apparatus and method for determining the energy expenditure of a subject by indirect calorimetry where respiratory gases O.sub.2 and CO.sub.2 are captured in a tent mask coupled through a pneumotach flow meter to a vacuum inlet of a blower fan whose speed is controlled by a computer running a program that ensures that the bias flow being drawn through the mask always exceeds the subject's peak expiratory flow. VO.sub.2 and VCO.sub.2 and flow values are measured on a breath-by-breath basis and used in arriving at a bias flow adjustment voltage to be applied to the blower fan for adjusting its speed.

A system and method for a user to select and implement a lifestyle intervention. The system and method allows the user to select a lifestyle intervention and define the parameters of the intervention. The system monitors physiological parameters of the user that are related to the lifestyle intervention.

Disclosed are methods and devices for analyzing aerosol particles in exhaled breath using diagnostic tools that enable rapid, low cost and autonomous point of care assays for several diseases including respiratory tract diseases. Disclosed are methods and devices for capturing exhaled breath aerosols in a packed bed column and analyzing exhaled captured breath aerosols for tuberculosis diagnosis.

Provided are methods that include presenting to a subject an embodied cognitive task that includes a cognitive component and a physical component. The methods further include assessing the subject's performance on each of the cognitive component and the physical component, and adapting the difficulty level of the embodied cognitive task based on the subject's performance on each of the cognitive component and the physical component. In certain aspects, the methods find use in enhancing cognition, physical fitness, or both, in a subject. Also provided are methods of treating and diagnosing cognitive disorders. Systems and computer readable media for practicing the methods of the present disclosure are also provided.

A breath analyzer includes a light source, a gas cell, a detection unit and a data processing unit. The light source emits infrared light of a wavelength band including an absorption line for acetone. A breath containing sample gas is introduced to the gas cell. The infrared light is incident on the gas cell. The detection unit receives transmitted light emerging from the gas cell, and outputs a sample signal value corresponding to an acetone discharge amount. The data processing unit determines an approximation formula of dependence of fat oxidation rate on acetone discharge amount in advance, and calculates a fat oxidation rate for individual sample signal values using the approximation formula. When the acetone discharge amount (microliter/min) is x, the fat oxidation rate (milligram/min) y is approximated by a following formula: y=Ax+B (where A and B are constants).