A study appearing in American Journal of Physical Medicine & Rehabilitation suggests that an increase of rehabilitation visits in patients with primary unilateral knee anthroplasty, exhibits a direct association to improved interlimb weight-bearing symmetry when squatting 60 degrees. During the study, researchers reportedly assessed the percentage of body weight placed over both limbs during stand and 30- and 60-degree squats in 38 patients who had primary unilateral knee anthroplasty.
In a recent news release from the American Physical Therapy Association (APTA), the researchers add that an asymmetry index was used as a marker in order to differentiate between patients who experienced moderate difficulty with functional tasks and patients who perceived only slight or no difficulty with functional activities based on the physical function dimension of the Western Ontario McMaster Universities Osteoarthritis index, one week following surgery. The study notes that stepwise regression was also conducted in order to pinpoint whether clinical characteristics predicted weight-bearing asymmetry at discharge.
The results indicate that at first observation, when compared with the uninvolved side of the body, participants placed significantly less body weight over the involved limb for stand and 30- and 60-degree squats. Researchers say the results paralleled those exhibited at participants’ last rehabilitation visit.
The results also indicate that the least moderate self-reported difficulty with functional tasks based on the receiver operator characteristic curve for the asymmetry index for the stand position was 0.64. However, according to the release, for the 30- and 60-degree squats, the area under the curve was 0.81 and 0.89, respectively.
Researchers conclude that following discharge from rehabilitation, they observed a moderate to good direct relationship between the number of rehabilitation visits completed and the weight-bearing asymmetry index for the 60-degree squat.