Evaluation of ActiGraph’s Low-Frequency Filter in Laboratory and Free-Living Environments

Abstract

Turning the LFE on lessens the underestimation of steps recorded at walking speeds ≤54 m·min for both the GT3X and GT1M. However, the increased sensitivity provided by the AG's LFE results in overestimation of steps taken throughout the day, when compared with the criterion device. Meanwhile, failure to turn the LFE on results in an underestimation of steps taken throughout the day.