MoveLab®: Validation and Development of Novel Cross-Platform Gait and Mobility Assessments using Gold Standard Systems

Wearable health assessment devices enable real-time clinical- and home-based patient monitoring. Human gait analysis is a widely accepted musculoskeletal assessment. 30-second-Sit-to-Stand (STS) and Timed-up-and-Go (TUG) are clinical frailty assessments used alongside gait. This study assessed the reliability and validity of the MoveLab® (Agile Kinetic 2024) approach to measure gait spatiotemporal parameters (STPs), STS and TUG using a waist-worn mobile phone, compared to ‘gold standard’ 3D marker-based motion capture (Qualisys AB, Sweden). Movement data, recorded simultaneously, for 25 healthy volunteers in a Biomechanics Laboratory, using the gold standard system and MoveLab®, was analysed using Intraclass Correlation (ICC), and Bland-Altman plots (Python), to quantify correlations, consistency, and significance across output parameters. Comparing the methods, STP consistency ranged from acceptable to excellent for all tested parameters (ICC 0.299–0.9). Highest and lowest correlations were cycle time and terminal double support time, respectively. TUG showed good agreement (ICC 0.757). Generally, an equal number of MoveLab® STS repetitions were observed. MoveLab® was shown to demonstrate validity and reliability when measuring movement parameters using a pouch-worn mobile phone device in healthy adults in a controlled laboratory environment.