Abstract: A neck exercise machine including a frame, a seat, a set of pulleys, a head band, an adjustable tensioner, and a cable adjustably attached to the head band, threaded through the pulleys, and removably connected to the adjustable tensioner, such that when a user sits in the seat and attaches the head band, they can exercise their neck muscles in a variety of different angles, rotations, and tensions. Elastic bands, an analog/digital force gauge, or hydraulic cylinder may be used as the adjustable tensioner and incorporate processor, memory, and data output mechanisms for performance analyses. The machine can also be broken down into numerous parts for easy transport and reassembly.