The most logical measure is to use the level of the feet as recording zero, so that any measure that does not reach the toes is negative and any reach past the toes is positive. A box is made with 9 inches (23 cm) at the level of the feet, so reaching 2 inches past the toes is recorded as 11 inches. A limitation of the traditional sit and reach procedure is that people with long arms and short legs would get a better result while those with long legs and short arms are at disadvantage. The modified sit and reach test controls for this, as the zero mark is adjusted for each individual, based on their sitting reach level.
