At these time-points , mean quadriceps strengths in the adductor group were 3.0 ( 2.75-3 .0 ) , 3.0 ( 3.0-4 .0 ) , and 4.0 ( 3.0-4 .0 ) , respectively , all of which were significantly stronger than the corresponding means in the femoral group , which were 2.0 ( 2.0-3 .0 ) , 2.0 ( 2.0-3 .0 ) , and 3.0 ( 2.0-4 .0 ) , respectively ( P < 0.05 ) .