This study aimed to quantify the intra-and inter-instrument reliability of the Actiwatch 4 accelerometer (AW4) in a mechanical setting. Twenty seven AW4 were attached to an isokinetic dynamometer and subjected to angular acceleration for 30 min at 50 deg/sec representing moderate intensity (MPA condition) and 200 deg/sec representing vigorous intensity (VPA condition), with a repeat trial conducted. Reliability was assessed using coefficient of variation (CV), absolute percent error (APE), and intraclass correlation coefficients (ICC).
Routen, A., UPTON, D., Edwards, M., & Peters, D. (2012). Intra-and inter-instrument reliability of the actiwatch 4 accelerometer in a mechanical laboratory setting. Journal of Human Kinetics, 31(1), 17-24. https://doi.org/10.2478/v10078-012-0002-z