Validity of wearable sensors for total knee arthroplasty (TKA) rehabilitation: A study in younger and older healthy participants
Lauren Forsyth, Alexandra Ligeti, Mark Blyth, Jon Clarke, Philip Riches
Abstract
BACKGROUND: against a clinical motion capture standard. METHODS: Twenty younger and 14 older healthy, able-bodied adults attended one testing session (Younger: 24 ± 4 years old; Older: 71 ± 5 years old). Movement was tracked using Vicon motion analysis and a Plug-In-Gait lower body model was applied to all participants. Three activities were performed - walking, stair ascent, stair descent. The knee flexion angle root mean square error (RMSE) between the technologies was determined. RESULTS: For both groups the knee flexion RMSE remained below 3° for all activities. The combined RMSE for all adults was 2.4° for walking, 2.7° for stair ascent, and 2.6° for stair descent. The signed error increased during the swing phase of gait. CONCLUSION: was found to accurately estimate knee flexion angles during several common activities compared to Vicon motion capture.