A Physical Therapist Administered Physical Activity Intervention After Total Knee Replacement
A Physical Therapist Administered Physical Activity Intervention After Total Knee Replacement
Background: The definitive treatment for knee osteoarthritis is Total Knee Replacement (TKR),
 which results in clinically meaningful improvements in pain and physical function. However,
 evidence suggests that physical activity remains unchanged after TKR. This randomized
 clinical trial is investigating the efficacy, fidelity, and safety of a physical therapist
 administered physical activity intervention for people after TKR.

 Methods/Design: One hundred and twenty-five individuals, over the age of 45, who seek
 outpatient Physical Therapy (PT) following a unilateral TKR will be randomized into a control
 and intervention group. The intervention group will receive a weekly physical activity
 intervention during PT, which includes a FitbitTM monitor, individualized step goals, and
 face-to-face feedback provided by the physical therapist. Efficacy of the intervention will
 be measured by minutes/week spent in Moderate-to-Vigorous Physical Activity (MPVA) using an
 Actigraph GT3X monitor from enrollment to discharge, 6 months and 12 months from discharge
 from PT. The association of self-efficacy for exercise and kinesiophobia with physical
 activity will also be measured at the same time points. Fidelity and safety of the
 intervention will be assessed during outpatient PT.

 Discussion: This study is designed to fill a critical clinical need to increase physical
 activity after TKR. The primary objective of the study is to evaluate the efficacy of a
 physical therapist administered physical activity intervention for people after TKR. The
 secondary objectives are to evaluate the fidelity and safety of a physical therapist
 administered physical activity intervention for people after TKR and to investigate changes
 in self-reported and performance-based physical function after a physical therapist
 administered physical activity intervention for people after TKR. The tertiary objective is
 to explore the association of psychosocial factors with physical activity 6 and 12 months
 after discharge from a physical therapist administered physical activity intervention for
 people after TKR. The findings will be used to support a large multi-site clinical trial to
 test the effectiveness, implementation, and cost of this intervention.
Inclusion Criteria:

 1. Over the age of 45

 2. Seeking outpatient physical therapy for a unilateral TKR

 Exclusion Criteria:

 1. Not interested in increasing physical activity

 2. Any other medical conditions that limit your physical activity

 3. Have had or are planning on having another leg surgery within 6 months that is
 unrelated to your TKR surgery

 4. Previously enrolled in a physical activity intervention study at this clinic