a torso support comprising an abdominal frame, a chest frame connected to the abdominal frame, a shoulder frame connected to the chest frame, and a back frame connected to the shoulder frame and configured to be at least partially provided on an opposite side of the abdominal frame with respect a user torso;

an arm frame configured to support a user arm;

a first guide connecting the torso support and the arm frame and comprising an inner space for communicating with at least an inner space of the torso support and an inner space of the arm frame;

a wrist frame configured to support a user wrist;

a second guide connecting the arm frame and the wrist frame and comprising an inner space for communicating with at least an inner space of the arm frame and an inner space of the wrist frame;

a glove connected to the wrist frame and configured to be worn on a user hand;

a rotatable dial supported by the chest frame;

a string connected to the dial, at least partially wound around the dial, and passing through the inner space of each of the torso support and the inner space of the first guide; and

an elastic band, a first end of the elastic band connected to at least the string and a second end of the elastic band connected to at least the wrist frame and/or the glove, the elastic band passing at least partially through the inner space of the arm frame and the inner space of the second guide, and configured for extending or contracting based on tension from the string.