Evaluating a Smart Activity Monitor for Knee Motion and Physical Activity
Author Information
Author(s): Huddleston James, Alaiti Amer, Goldvasser Dov, Scarborough Donna, Freiberg Andrew, Rubash Harry, Malchau Henrik, Harris William, Krebs David
Primary Institution: Harvard Medical School
Hypothesis
The modified IDEEA system will accurately measure knee flexion angles and detect physical activities compared to the Biomotion Laboratory's gold standard.
Conclusion
The modified IDEEA system is a useful clinical tool for evaluating knee motion and multiple physical activities in the ambulatory setting.
Supporting Evidence
- The IDEEA system accurately measured knee flexion angles with correlations ranging from .97 to .98 compared to the Biomotion Laboratory.
- Subjects flexed their knees greater than 120° for only 0.17% of their data collection periods.
- The IDEEA system was able to identify various physical activities accurately during testing outside the laboratory.
Takeaway
Researchers tested a smart device that tracks knee movement and activities, finding it works well for measuring how people move in everyday life.
Methodology
The study compared knee motion data from the IDEEA system with data from the Biomotion Laboratory in 5 healthy subjects during various physical activities.
Limitations
The study was limited by the small sample size and the specific activities tested, which may not represent all daily activities.
Participant Demographics
The sample included 3 males and 2 females with a mean age of 43.8 years and a body mass index of 24.1.
Digital Object Identifier (DOI)
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