The disclosed mechanical cardio-pulmonary resuscitation (CPR) apparatuses, systems, and devices have a plunger and a plunger displace sensor that can sense plunger displacement information during reciprocating cycles of the plunger. The disclosure CPR apparatuses, systems, and devices also have a microprocessor unit that can receive sensed plunger displacement information from the sensor and generate plunger driving instructions based on the plunger displacement information. The plunger driving instructions have one or both of a plunger driving force and a plunger amplitude for the reciprocating cycles.

A calf massage module includes: at least one movable shaft inserted into a spring so as to move forward or rearward by the compression and expansion of the spring; a massage module housing having a movable shaft guide part for guiding the movement of the movable shaft; and a moving housing inserted into the massage module housing according to the movement of the movable shaft.

A CPR chest compression device with a cooling exhaust flow path configured to direct cooling air flow through the device. A CPR chest compression device with a battery retainer interoperable with the control system to provide for controlled shut-down when an operator attempts to remove the battery during operation.

A chest compression device with a chest compression belt assembly including guards and sensors operable with a control system to control operation of the system depending on detection of proper installation of the guards.

The described knee rehabilitation device can include any suitable component. In some implementations, however, it includes a sitting surface that is configured to support a user; a knee arm that comprises a leg coupling mechanism, that is pivotally coupled to the rehabilitation device, and that is configured to pivot through a range of motion; and a drive mechanism that is configured to force the knee arm through the range of motion. In some cases, the drive mechanism includes a first hard stop that prevents the knee arm from extending past a first set point, and the drive mechanism further includes a second hard stop that prevents the knee arm from being retracted past a second set point. In some cases, the device is further configured to be programmed to electronically limit the knee arm's range of motion. Other implementations are discussed.

The disclosed mechanical cardio-pulmonary resuscitation (CPR) apparatuses, systems, and devices have a plunger and a plunger displace sensor that can sense plunger displacement information during reciprocating cycles of the plunger. The disclosure CPR apparatuses, systems, and devices also have a microprocessor unit that can receive sensed plunger displacement information from the sensor and generate plunger driving instructions based on the plunger displacement information. The plunger driving instructions have one or both of a plunger driving force and a plunger amplitude for the reciprocating cycles.

A chest compression device with a chest compression belt assembly including guards and sensors operable with a control system to control operation of the system depending on detection of proper installation of the guards.

A vertical motion adjuster for a thermotherapy device includes a conveyance unit provided with a movable member configured to move along a mat, a support unit having a first side and a second side, the first side rotatably coupled to one side of the conveyance unit, and an elevation unit installed between the conveyance unit and the support unit and configured to adjust an angle of inclination of the support unit by raising or lowering the second side of the support unit such that the second side of the support unit is moved in the shape of an arc.

An apparatus for dry hydro-therapy body massage of a user in a reclined position, including a housing structure having a user support surface for supporting the user in a seated position, the user support surface including a seat back portion, a seat portion with a semi-cylindrical main seat section and a leg seat section, wherein the seat back portion and the leg seat section are in relative angular relation to each other and the main seat section is disposed therebetween, and a fluid spray assembly interiorly within the housing structure for directing a fluid stream at the user support surface for imparting a massaging effect through the support surface to the upper body portion and lower body portion of the user.

An exercise device comprises a base. A power mechanism and a vibration mechanism are each disposed in the base. The power mechanism powers the vibration mechanism. The vibration mechanism provides linear vibrations through the base of the device in a first axis parallel to a longitudinal axis of a user standing on the base. In some embodiments, the device is substantially free of vibration in a plane orthogonal to the first axis and is substantially free of rotational vibration in any direction at a time when the vibration mechanism provides the first plurality of linear vibrations. In some embodiments, the vibration mechanism operates between 10 and 60 Hz. In some embodiments an exercise kit is provided that includes the referenced exercise device, an exercise bar, and one or more elastic bands, each elastic band for removably coupling the base to the exercise bar.