Embodiments of the present invention provide a headband device for stimulating hair growth. The device comprising one or more comb tooth piece configured to detachably connect with an inner surface of the headband body; at least one stimulation element on the inner surface of the headband body; one or more massage head on the inner surface of the headband body; and a driving assembly connected to the one or more massage head, the driving assembly is configured to rotate the massage head. The headband body has a first magnetic piece and the one or more comb tooth piece has a second magnetic piece that detachably attached to the first magnetic piece.

A device is for increasing mobility and/or flexibility of a body including a spine. The device includes a frame and a platform disposed on the frame. The platform has an opening. The device also includes an arcuate body rotatably supported about a rotation axis by the device such that at least a portion of the arcuate body is disposed within the opening. The arcuate body may include a yoga wheel, a foam roller, a ball, or the like.