Abstract: A sarcopenia evaluation method in a sarcopenia evaluation device that evaluates sarcopenia based on a walking motion of a subject includes: acquiring walking data related to walking of the subject; detecting, from the walking data, at least one walking parameter of an angle of a knee joint of one leg in a stance phase of the one leg of the subject, an angle of the knee joint of the one leg in a swing phase of the one leg, a vertical displacement of a toe of one foot in the stance phase, a vertical displacement of the toe of the one foot in the swing phase, an angle of an ankle joint of the one foot in the stance phase, and an angle of the ankle joint of the one foot in the swing phase; and determining whether or not the subject has sarcopenia using at least one walking parameter.

Abstract: A cognitive function evaluation method in a cognitive function evaluation device that evaluates a cognitive function based on a walking motion of a subject includes: acquiring walking data related to walking of the subject; detecting, from the walking data, at least one of an angle of an ankle joint of one foot and an angle of a knee joint of one leg of the subject; and determining a cognitive function level of the subject using at least one of the angle of the ankle joint and the angle of the knee joint.

Abstract: A factor estimation system is a factor estimation system that estimates a factor of fall risk indicating a possibility of a fall of a measured person, including: a calculator that obtains body motion data indicating body motion of the measured person during walking, and calculates two or more walking parameters of the measured person based on the body motion data obtained; and a factor analyzer that estimates, based on the two or more walking parameters, one or more main components that are included in the factor of the fall risk of the measured person and are based on the two or more walking parameters, and outputs an estimation result.

Abstract: A leg muscle strength estimation system includes: an obtainer that obtains an image including a user that is walking as a subject of the image; and an estimator that estimates a leg muscle strength of the user based on the obtained image.

Abstract: A sarcopenia evaluation method in a sarcopenia evaluation device that evaluates sarcopenia based on a walking motion of a subject includes: acquiring walking data related to walking of the subject; detecting, from the walking data, at least one walking parameter of an angle of a knee joint of one leg in a stance phase of the one leg of the subject, an angle of the knee joint of the one leg in a swing phase of the one leg, a vertical displacement of a toe of one foot in the stance phase, a vertical displacement of the toe of the one foot in the swing phase, an angle of an ankle joint of the one foot in the stance phase, and an angle of the ankle joint of the one foot in the swing phase; and determining whether or not the subject has sarcopenia using at least one walking parameter.

Abstract: A cognitive function evaluation method in a cognitive function evaluation device that evaluates a cognitive function based on a walking motion of a subject includes: acquiring walking data related to walking of the subject; detecting, from the walking data, at least one of an angle of an ankle joint of one foot and an angle of a knee joint of one leg of the subject; and determining a cognitive function level of the subject using at least one of the angle of the ankle joint and the angle of the knee joint.

Abstract: A fall risk evaluation method in a fall risk evaluation device that evaluates a fall risk based on a walking motion of a subject includes: acquiring walking data related to walking of the subject; detecting, from the walking data, at least one walking parameter of a vertical displacement of a waist of the subject in a stance phase of one leg of the subject, a vertical displacement of the waist of the subject in a swing phase of the one leg, an angle of a knee joint of the one leg in the stance phase, and an angle of an ankle joint of one foot in the swing phase; and determining a fall risk of the subject by using at least one walking parameter.

Abstract: Provided is a massager which enables armrests to be used effectively even with a backrest in a reclined state. The massager includes: a backrest having a massaging mechanism for massaging the back of a user; a frame which supports the backrest in such a manner that the backrest can be reclined backwards; a pair of armrests which extend forward respectively from left and right side positions of the backrest; and a linking mechanism which changes an attitude of the pair of armrests in conjunction with a reclining operation of the backrest, in such a manner that a rear part of each armrest falls lower than the front part of each armrest, when the backrest is reclined backward.

Abstract: A massager in which a backrest and side walls holding massage members have a unified form, is provided. The massager has: a backrest including, in an integrated fashion, a backrest section in which a massage mechanism for massaging a user's back is provided, and a pair of projecting sections which project to the left and right-hand sides from at least the upper part of the backrest section; side walls which respectively project forwards from front surfaces of the pair of projecting sections; and air bags which are provided respectively on inner side faces of the pair of side walls and used for massaging the sides of the user leaning against the backrest section.

Abstract: A chair-type massage machine includes a seat on which a user sits; a leg rest whose one end portion is pivotally connected with a front portion of the seat for pivotal movement up and down, the leg rest supporting calves of the user; a driving unit for pivotally moving the leg rest with respect to the seat; a footrest pivotally connected with the other end portion of the leg rest for pivotal movement up and down, the footrest supporting feet of the user; and a massage means provided to at least one of the leg rest and the footrest. Also, a stopper unit is provided for restricting a pivotal movement range of the footrest with respect to the leg rest, and a biasing unit is disposed for applying a biasing force to the footrest in either an upward or downward a direction of the pivotal movement.

Abstract: A chair-type massage machine includes a seat on which a user sits; a leg rest whose one end portion is pivotally connected with a front portion of the seat for pivotal movement up and down, the leg rest supporting calves of the user; a driving unit for pivotally moving the leg rest with respect to the seat; a footrest pivotally connected with the other end portion of the leg rest for pivotal movement up and down, the footrest supporting feet of the user; and a massage means provided to at least one of the leg rest and the footrest. Also, a stopper unit is provided for restricting a pivotal movement range of the footrest with respect to the leg rest, and a biasing unit is disposed for applying a biasing force to the footrest in either an upward or downward a direction of the pivotal movement.