BALANCE BOARD, rectangular, 2 spheres (Freeman)

A flat, rigid beam that is placed on the floor and upon which a patient with difficulties in balance (e.g., a paraplegic or a stroke victim) walks for balance training. It is slightly elevated off of the floor and is available in various widths; some types may provide a motion (e.g., rock) to increase the level of difficulty.

What differentiates the five types (and their subtypes) is how unstable each of them is, i.e., in how many and in which of the three dimensions of space each board turns and/or sways and how freely its fulcrum contacts the board and the ground.

• A rocker board is a flat board with a fulcrum attached to the board's underside, it only tips in two directions; front to back or side-to-side
• Rocker-roller board is a rectangular or oval shaped board that balances on top of a cylinder or roller of some kind. It will only tip in two directions, similar to a rocker board; front to back or side-to-side,
• Wobble board: a round wooden or plastic board with one or two small domes on the bottom giving it a small point of ground contact that allows the board to move in any direction.
• Sphere-and-ring board: the fulcrum is an inflatable rubber ball (such as a basketball) or a solid polyurethane ball, on which the board is balanced. The fulcrum is kept contained under the board by a guard rail or ring on the underside. Difficulty and speed are determined by: ring shape & size, sphere's size & weight & rigidity, board's shape & size.
• Spring board: the fulcrum consists of four individual compression springs situated between the base and the platform​

The balance board can be used to perform proprioception exercises as part of lower limb rehabilitation or proprioceptive training, for example.

It is also used during training and physical preparation to strengthen deep muscles. With regular training, this balance board helps to improve mobility, balance and muscle strength.