A system of estimating acclimatization to environmental conditions, and providing a corrected fitness level estimates based on said acclimatization level. The environmental conditions are particularly related to heat and altitude. At first previous training history is provided including a plurality of day records, where each day record includes a date stamp and information regarding altitude and optionally temperature and humidity and training history including timestamp and training load data from executed exercises in stored records.

An apparatus for aiding the self-regulation of stress, including a vibrating element vibratable at varying frequencies of vibration, and heart signals or breathing signals monitoring means, and a data processing means. The data processing means includes means for calculating a stress indicator value, based on the heart signals or the breathing signals and that the data processing means includes a means of determining a mechanical vibration rhythm, based on the stress indicator value, including vibrations of one or more frequencies, which is induced in the vibratable element. The data processing means is configured, to create continuous real time feedback loop between the measured heart or breathing rate and calculated stress indicator value and the induced vibration rhythms. Attaching means are included, which can be a strap or harness, or attachments for articles of clothing, for attaching the apparatus to the usersuch that the vibrating element of the apparatus is located in the thoracic region of the user's body.

A radiation suite includes a room having a floor, a ceiling, and one or more walls, a radiation system including a gantry enclosing a radiation source and a couch, and an image projection system operable to project an image on a projection surface on at least a portion of the gantry and/or the couch, providing a calming environment for a patient to relax. The image projection system comprises a computer and one or more projectors operably controlled by the computer. The computer comprises a mapping software operable to map an image file to the projection surface. The one or more projectors are operable to project the mapped image file on the projection surface.

A method comprising: acquiring via a network biogas information representing a concentration of furfural of the user acquired by a sensor that detects the furfural discharged from a skin surface of the user; obtaining the reference information representing a lower limit of a normal range of the concentration of furfural per unit period of time, using a memory storing the reference information; and outputting information related to stress of the user an information terminal of the user, after it is determined that a frequency that concentration of the furfural of the user per the unit period of time is less than the lower limit of the normal range tends to increase, based on the biogas information acquired in a pregnancy period of the user.

In order to objectively grasp a stress state of a user and to prevent postpartum depression, biological gas information is acquired via a network, where the biological gas information indicates a concentration of 2-ethyl-1-hexanol of the user and is obtained by a sensor that detects 2-ethyl-1-hexanol released from a skin surface of the user. From a memory storing information including an upper limit of a normal range of the concentration of 2-ethyl-1-hexanol per unit period, the information indicating the upper limit of the normal range is read out. When a frequency in the unit period with which the concentration of 2-ethyl-1-hexanol of the user exceeds the upper limit of the normal range is determined to have an increasing tendency based on the biological gas information obtained during a pregnancy period of the user, the information related to stress of the user is output to an information terminal of the user.

To objectively grasp a stress state of a user and to prevent a mental disorder of the user, the following steps are performed: acquiring, via a network, biogas information at multiple timings and time information corresponding to each of the multiple timings, wherein the biogas information represents a concentration of 2-ethyl-1-hexanol of a user acquired by a sensor that detects 2-ethyl-1-hexanol discharged from a skin surface of the user; obtaining reference information representing an upper limit of a normal range of the concentration of 2-ethyl-1-hexanol per unit period of time, using a memory storing the reference information representing the upper limit of the normal range; determining a stress time period during which a concentration of the 2-ethyl-1-hexanol of the user is more than the upper limit of the normal range, based on the acquired biological gas information; and outputting time period information indicating the determined stress time period to an information terminal of the user, to display the stress time period indicated by the time period information on a display of the information terminal.

To objectively grasp a stress state of a user and to prevent a mental disorder of the user, the following steps are performed: acquiring, via a network, biogas information at multiple timings and time information corresponding to each of the multiple timings, wherein the biogas information represents a concentration of 1-dodecanol of a user acquired by a sensor that detects 1-dodecanol discharged from a skin surface of the user; obtaining reference information representing an upper limit of a normal range of the concentration of 1-dodecanol per unit period of time, using a memory storing the reference information representing the upper limit of the normal range; determining a stress time period during which a concentration of the 1-dodecanol of the user is more than the upper limit of the normal range, based on the acquired biological gas information; and outputting time period information indicating the determined stress time period to an information terminal of the user, to display the stress time period indicated by the time period information on a display of the information terminal.

A method includes: acquiring, via a network, biogas information at multiple timings and time information corresponding to time at each of the multiple timings, wherein the biogas represents a concentration of 2-ethylhexanoic acid of a user acquired by a sensor that detects the 2-ethylhexanoic acid discharged from a skin surface of the user; obtaining reference information representing a lower limit of a normal range of 2-ethylhexanoic acid per unit period of time, using a memory storing the reference information representing the lower limit of the normal range; determining a stress time period during which a concentration of the 2-ethylhexanoic acid of the user is less than the lower limit of the normal range, based on the acquired biogas information; and outputting time period information indicating the determined stress time period to an information terminal of the user.

To objectively grasp a stress state of a user and to prevent a mental disorder of the user, the following steps are performed: acquiring, via a network, biogas information at multiple timings and time information corresponding to each of the multiple timings, wherein the biogas information represents a concentration of hexadecane of a user acquired by a sensor that detects hexadecane discharged from a skin surface of the user; obtaining reference information representing an upper limit of a normal range of the concentration of hexadecane per unit period of time, using a memory storing the reference information representing the upper limit of the normal range; determining a stress time period during which a concentration of the hexadecane of the user is more than the upper limit of the normal range, based on the acquired biological gas information; and outputting time period information indicating the determined stress time period to an information terminal of the user, to display the stress time period indicated by the time period information on a display of the information terminal.

In order to objectively grasp a stress state of a user and to prevent postpartum depression, biological gas information is acquired via a network, where the biological gas information indicates a concentration of benzyl alcohol of the user and is obtained by a sensor that detects benzyl alcohol released from a skin surface of the user. From a memory storing information including an upper limit of a normal range of the concentration of benzyl alcohol per unit period, the information indicating the upper limit of the normal range is read out. When a frequency in the unit period with which the concentration of benzyl alcohol of the user exceeds the upper limit of the normal range is determined to have an increasing tendency based on the biological gas information obtained during a pregnancy period of the user, the information related to stress of the user is output to an information terminal of the user.