A device for muscle strength support includes a flexible support structure configured to be worn on a body of a user during use of the device and an actuator unit configured to exert a tensile force on a first tension member of the flexible support structure to support the muscle strength during a movement of a first body part. The first tension member extends along a first path through a guide strap of the flexible support structure to the actuator unit, the guide strap limiting a section of the first path in a direction perpendicular to a path longitudinal direction. The first tension member is further configured to be attached to the first body part during use of the device by a first fastening member.
