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Updated: Feb 12, 2026

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds
Published on: August 25, 2020
Tracking Steps on Apple Watch at Different Walking Speeds
Praveen Veerabhadrappa1, Matthew Duffy Moran2, Mitchell D Renninger2
1Kinesiology, Division of Science, The Pennsylvania State University, Reading, PA, USA. pmv5057@psu.edu.
Key Points:
QUESTION: How accurate are the step counts obtained from Apple Watch?
Findings:
In this validation study, video steps vs. Apple Watch steps (mean ± SD) were 2965 ± 144 vs. 2964 ± 145 steps; P < 0.001. Lin's concordance correlation coefficient showed a strong correlation (r = 0.96; P < 0.001) between the two measurements. There was a total error of 0.034% (1.07 steps) for the Apple Watch steps when compared with the manual counts obtained from video recordings.
Meaning:
Our study is one of the initial studies to objectively validate the accuracy of the step counts obtained from Apple watch at different walking speeds. Apple Watch tested to be an extremely accurate device for measuring daily step counts for adults.
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