Abstract: The invention relates to a fitness, exercise and massage roller, which roller (10) has a substantially cylindrical shape and a hollow opening (13) around its imaginary center axis, which roller (10) comprises two or more frame parts (11,12), which are at least part-circular in their outer form and configured to form the cylindrical shape of the roller (10). At least one of the frame elements (11, 12) is separable or turnable from connection with the other frame elements (11, 12) such, that a longitudinal opening is formed and that the roller (10) is configured to be located around a bar (51) or like via the longitudinal opening.

Abstract: An adjustable fitness and massage roller formed as a tubular structure is disclosed. The tubular structure has protrusions that can be continuously adjusted via an adjustment mechanism to extend out from the circumferential surface of the roller. In a basic position the circumferential surface is smooth and the he protrusions are not extending outward. In an extreme working position the protrusions are in utmost extended position. The user can adjust the surface of the roller according to her/his preference by adjusting the position of the protrusions.

Abstract: The invention relates to a device for measuring and teaching human position and/or movement, comprising an actuator, specifically a motor-gear assembly, a sensor for measuring a change of the human position and/or movement in at least one joint area, and a control unit for storing the position and/or movement changes measured by the sensor and for controlling the actuator. The device comprises a power supply for operating the actuator, a tensioning mechanism, which is attachable to human skin, linked to the actuator and operated by the actuator, and which communicates to the skin a correction-oriented tensioning stimulus.

Abstract: An adjustable fitness and massage roller formed as a tubular structure is disclosed. The tubular structure has protrusions that can be continuously adjusted via an adjustment mechanism to extend out from the circumferential surface of the roller. In a basic position the circumferential surface is smooth and the he protrusions are not extending outward. In an extreme working position the protrusions are in utmost extended position. The user can adjust the surface of the roller according to her/his preference by adjusting the position of the protrusions.