Lower-limb force production in individuals after unilateral total knee arthroplasty.
OBJECTIVE
To determine and compare lower-limb force production during a single-leg horizontal press in involved and uninvolved limbs in people with unilateral total knee arthroplasty (TKA) and the limb of age- and gender-matched subjects.


METHODS
Quasi-experimental, posttest only control group design.


METHODS
Subjects living in the community and were tested at a university facility.


METHODS
Nine people with unilateral TKA and 9 subjects without TKA volunteered. The mean postsurgery time for the TKA group was 15.89+/-6.62 months.


METHODS
Not applicable.


METHODS
Force production in kilograms during a single-leg press.


RESULTS
Lower-limb force production differed significantly between involved and uninvolved limbs (P=.007) for the unilateral TKA group. Lower-limb force production of the involved limb in persons with unilateral TKA was significantly lower than the limb of the age- and gender-matched controls (P=.0001).


CONCLUSIONS
Lower-limb force production on the involved side was significantly lower than the uninvolved side. When compared with an age-matched control group, subjects with unilateral TKA produced less force during a single-leg horizontal press.
Department of Physical Therapy, State University of New York, Stony Brook, NY 11794-8201, USA. mark.rossi@sunysb.edu
Mark D
MD
Rossi
Scott
S
Hasson
D000203:Activities of Daily Living; D000368:Aged; D000704:Analysis of Variance; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects* / Q000534:rehabilitation; D001696:Biomechanical Phenomena; D001827:Body Height; D015992:Body Mass Index; D001835:Body Weight; D016022:Case-Control Studies; D004548:Elasticity; D005081:Exercise Therapy / Q000379:methods; D005260:Female; D006801:Humans; D007537:Isometric Contraction; D007720:Knee Prosthesis; D035002:Lower Extremity / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D018908:Muscle Weakness / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*; D020380:Needs Assessment; D016059:Range of Motion, Articular; D019415:Torque; D016474:Weight-Bearing