Date Approved


Graduate Degree Type


Degree Name

Physical Therapy (M.S.)

Degree Program

Physical Therapy

First Advisor

Gordon Alderink

Second Advisor

Jolene Bennett

Third Advisor

Alma Mulder


The purposes of this study were: (1) to investigate the relationships between isokinetically tested quadriceps femoris and hamstring strength, the subjects' self-assessment of knee function, and three functional tests, and (2) to determine the strength and functional differences between the surgical and non-surgical limbs. Subjects included 18 males and 27 females aged 18 to 45 years who had undergone anterior cruciate ligament reconstruction. Knee strength was measured at 180, 300, and 450{dollar}\sp\circ{dollar}/second and normalized to body weight, while functional hop data were normalized to height. Significant differences existed between limbs for the single, triple, and cross-over hops, and all, but one, isokinetic extension variable. Moderate to good correlations were found between knee extension values and the single, triple, and cross-over hops. Fair correlations were noted between knee flexors and the triple and cross-over hops. Results suggest clinicians should use both strength and functional measures to determine return to activity.


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