A player can be classified as a 2.5 point player if they display characteristics of a 2 point player and 3 point player, and it is not easy to determine exactly which of these two classes the player fits in.  2 point players need to put one hand on their chair's wheel for stability when trying to rebound. This is because of stability issues. When pushing themselves around the court, they do not require the back of their chair to maintain stable forward movement. There is a significant difference in special endurance between 2 point players, and 3 and 4 point players, with 2 point players having less special endurance. 1 point and 2 point players handle the ball the least on court. People with amputations may compete in this class. This includes A1and A9 ISOD classified players. Because of the potential for balance issues related to having an amputation, during weight training, amputees are encouraged to use a spotter when lifting more than . ISOD classified A1 players may be found in this class. This ISOD class is for people who have both legs amputated above the knee. There is a lot of variation though in which IWBF class these players may be put into. Those with hip articulations are generally classified as 3 point players, while those with slightly longer leg stumps in this class are 3.5 point players. Lower limb amputations effect a person's energy cost for being mobile. To keep their oxygen consumption rate similar to people without lower limb amputations, they need to walk slower. A1 basketball players use around 120% more oxygen to walk or run the same distance as some one without a lower limb amputation. ISOD classified A9 players may be found in this class. The class they play in will be specific to the location of their amputations and their lengths. Players with hip disarticulation in both legs are 3.0 point players while players with two slightly longer above the knee amputations are 3.5 point players. Players with one hip disarticulation may be 3.5 point players or 4 point players. People with amputations longer than 2/3rds the length of their thigh when wearing a prosthesis are generally 4.5 point players. Those with shorter amputations are 4 point players. At this point, the classification system for people in this class then considers the nature of the hand amputation by subtracting points to assign a person to a class. A wrist disarticulation moves a player down a point class while a pair of hand amputations moves a player down two point classes, with players with upper limb amputations ending up as low as a 1. point player.