-SupportNone NoneSlightorperiodical StickorcrutchSevereandconstant Weight-bearingimpossible Section 3- Pain Section 4- InstabilityNone NevergivingwayInconstantandslightduringsevereexertion RarelyduringathleticsorothersevereexertionMarkedduringsevereexertion Frequentlyduringathleticsorothersevereexertion(orincapableofparticipation)Markedonorafterwalkingmorethan2km OccasionallyindailyactivitiesMarkedonorafterwalkinglessthan2km OftenindailyactivitiesConstant Everystep Section 5-Locking Section 6-SwellingNolockingandnocatchingsensations NoneCatchingsensationbutnolocking asionally OnordinaryexertionFrequently ConstantLockedjointonexamination Section 7-Stair-climbing Section8- SquattingNoproblems NoproblemsSlightlyimpaired SlightlyimpairedOnestepatatime Notbeyond90°Impossible Impossible