user kneels or sits on. The Aquatic Balance Board (a.k.a. the Aquafit Balance Board) is a wobble board. The holes in it allow water to fill it, making it neutrally buoyant (i.e., neither sinking on its own nor floating up to the water's surface) so that it is easier to control and safer than it would be if this wobble board were more buoyant. Two products that Theraquatics Australia calls balance boards, its Star Balance Board and its Theraquatics Balance Board with Straps, are not balance boards in the familiar sense of the term, though they can be used for practicing balance skills. Wii The Wii Balance Board is not a rocking board as described in this article, but an electronic board which tracks the user's center of balance. It is used as an accessory with the Nintendo Wii game console and compatible applications such as Wii Fit. Psychological aspects Proper use of a balance board is a test of both physical skill and the user's sense of balance. Another sensation often experienced by a user of a balance board is the sensation of falling. Apart from actually falling, this often occurs during sharp accelerations caused by leaning too far or too quickly. Feeling like falling can raise fears and provoke reflexes that while useful on a stable surface can be counter-productive on a balance board, such as throwing the arms forward to catch the fall or over-correcting and sharply shifting weight onto the opposite leg, causing a fall in the opposite direction. Injury risk and prevention Falls from balance boards can break bones, sprain joints, and tear tendons, ligaments and cartilage. These risks can be diminished by preparing the space, wearing protective gear and following manufacturers' other safety recommendations. Risk can be lowered by anticipating falls and clearing the surrounding area of objects that the rider might fall onto, and making sure that the surface is soft. Some of the best surfaces for balance boarding include a soft yoga mat, a patch of grass, or the sand. Important protective gear is gear that protects the joints, the head and face, and otherwise protects from bumps and scrapes during falls. Care should be taken in selecting a helmet, as the weight could make falls worse or the shape might be unsuited for protecting from falls and might be pressed into the neck during impact. Standing on a balance board is