For the standing division, you must have a physical disability that prevents you from safely handling the weights in the open division and/or competing evenly against athletes without any disabilities. For the seated division, you need to either have a physical disability that requires you to use a wheelchair or you meet the physical criteria for the standing division but you choose to compete in a wheelchair. For instance, if you have a prosthetic leg, you may compete in either division, depending on how you feel the prosthetic limb will hold up. If you are competing in the seated division, all athletes will be using the same wheelchair for the events. For the neuro division, you must have cerebral palsy, spina bifida, MS, or some similar condition that impairs optimal neurological function at a high enough level to put you at a disadvantage going against someone with a fully functional nervous system. One Arm athletes would be lifting a Dumbbell instead of a log.