Functional Classification of Progressive Muscular Dystrophy

Ⅰ	Can walk and climb stairs (without assistance)
Ⅱ	Can walk, but must hold onto the handrail to climb stairs
Ⅲ	Can walk, but must hold onto the handrail and move slowly to climb stairs (it takes more than 25 seconds to climb 8 standard steps)
Ⅳ	Can walk and stand up from a chair without assistance, but cannot climb stairs
Ⅴ	Can walk without assistance, but cannot stand up from a chair or climb stairs
Ⅵ	Can walk only with assistance or can walk independently while wearing long leg braces
Ⅶ	Must wear long leg braces and require assistance from others to maintain balance while walking
Ⅷ	Can stand while wearing long leg braces, but cannot walk even with assistance
Ⅸ	Can only sit in a wheelchair or lie in bed