Related Experiment Video
Updated: Sep 4, 2025
07:24
A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers
Published on: April 21, 2017
12.6K
Correlations between objective and self-reported step count adherence following total knee replacement: A
Vicky Duong1, Simone Dennis1, Manuela L Ferreira1,2
1Sydney Musculoskeletal Health, Kolling Institute of Medical Research, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.
Summary
Physically active individuals after total knee replacement (TKR) often accurately self-report step count adherence. Combining self-reports with objective activity tracker data improves accuracy in physiotherapy interventions.
Area of Science:
- Orthopedics
- Rehabilitation Science
- Digital Health
Background:
- Total knee replacement (TKR) recovery involves physical activity crucial for outcomes.
- Monitoring physical activity post-TKR is essential for rehabilitation success.
- Activity trackers and self-reporting are common methods for tracking adherence.
Purpose of the Study:
- To assess physical activity levels in individuals post-TKR.
- To evaluate the accuracy of self-reported step count adherence compared to objective measures.
- To inform the use of self-reported adherence in physiotherapy interventions.
Main Methods:
- Observational cohort study within a randomized clinical trial.
- Included 51 participants from the intervention group of the PATHway trial.
- Utilized activity trackers for objective step count and self-reported adherence scales over 3 months.
Main Results:
- Step counts increased for 8 weeks, plateauing around 7500 steps/day.
- 65.8% of participants accurately self-reported step count adherence up to 12 weeks.
- A significant difference was found between self-reported and objective adherence from weeks 2-10.
Conclusions:
- Individuals post-TKR are generally active and meet step goals.
- Self-reported adherence is reasonably accurate but benefits from objective validation.
- Integrating objective data with self-reports can enhance physiotherapy-led behavioral change interventions.
