“Stepping Up” Activity Poststroke: Ankle-Positioned Accelerometer Can Accurately Record Steps During Slow Walking

Figures

Figure 1.

Estimated relationship between speed and error for each accelerometer location (waist, ankle) based on the linear mixed model.

Figure 2.

The Fitbit One positioned on a participant's (A) waist and (B) ankle.

Table 2.

Walking Impairments Observed During Self-selected Walking Speed Trial

Table 1.

Participant Characteristics (N=43)

Table 4.

Final Linear Mixed Model Predicting Fitbit Error

Table 3.

Accuracy of the Accelerometer at Varying Walking Speeds^{^a}

↵^a CI=confidence interval.
^b Number of participants for whom the accelerometer counted zero steps for the walking trial. The accelerometer was positioned on each participant's nonparetic side on a waistband (lateral point [Accel-Waist]) and ankle strap (above the lateral malleolus [Accel-Ankle]).
^c Absolute error, calculated as: [(Accelerometer steps – Actual steps)/Actual steps) × 100]. Calculation performed on individual data, so may not equate if calculation completed on group data presented above.
^d Paired t test between Accel-Ankle and Accel-Waist; Bonferroni-corrected P values reported.