with impaired muscle power have a health condition that either reduces or eliminates their ability to voluntarily contract their muscles in order to move or to generate force impaired passive range of movement athletes with impaired passive range of movement have a restriction or a lack of passive movement in one or more joints limb deficiency athletes with limb deficiency have total or partial absence of bones or joints as a consequence of trauma for example traumatic amputation illness for example amputation due to bone cancer or congenital limb deficiency for example dysmelia leg length difference athletes with leg length difference have a difference in the length of their legs as a result of a disturbance of limb growth or as a result of trauma short stature athletes with short stature have a reduced length in the bones of the upper limbs lower limbs andor trunkindias paraathletics contingent during its departure for tokyo from delhi photo sai twitter hypertonia athletes with hypertonia have an increase in muscle tension and a reduced ability of a muscle to stretch caused by damage to the central nervous system ataxia athletes with ataxia have uncoordinated movements caused by damage to the central nervous system athetosis athletes with athetosis have continual slow involuntary movements vision impairment athletes with vision impairment have reduced or no vision caused by damage to the eye structure optical nerves or optical pathways or visual cortex of the brain intellectual impairment athletes with an intellectual impairment have a restriction in intellectual functioning and adaptive behaviour which affects conceptual social and practical adaptive skills required for everyday life this impairment must be present before the age of 18if an athletes physical impairment is part of the above the 10 eligibility criteria parameters he or she can be a part of the paralympic movement the next step is determining which group class the athlete needs to be in so that he or she competes only with other athletes who have either the exact same physical impairment or impairment that causes similar activity limitation this grouping is what the numbers next to the names of the athletes signifypci president deepa malik watching the tt action at the tokyo paralympics photo courtesy pci twitteraccording to the ipc website a sport class groups athletes with a similar activity limitation together for competition so that they can compete equitably this again means that sport classes are different by sport it also means that a sport class does not necessarily comprise athletes with the same eligible impairment if different impairments cause similar activity limitations athletes with these impairments are allowed to compete together this is why for example in athletics wheelchair racing events you will see athletes with paraplegia and leg amputations racing together different athletes are classified into different classes depending on their physical impairmentfor example two time paralympic gold medallist javelin thrower devendra jhajharias physical impairment is limb deficiency and his classification class in the rio games 2016 where he won