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Journal of General Internal Medicine
Published in: Journal of General Internal Medicine 6/2018

01-06-2018 | Concise Research Reports

Tracking Steps on Apple Watch at Different Walking Speeds

Authors: Praveen Veerabhadrappa, M.B.B.S., M.S., Ph.D., Matthew Duffy Moran, B.S., Mitchell D. Renninger, B.S., Matthew B. Rhudy, Ph.D., Scott B. Dreisbach, B.S., Kristin M. Gift, B.S.

Published in: Journal of General Internal Medicine | Issue 6/2018

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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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Garber CE, Blissmer B, Deschenes MR, Franklin BA, Lamonte MJ, Lee IM, et al. (2011) American College of Sports Medicine position stand. Quantity and quality of exercise for developing and maintaining cardiorespiratory, musculoskeletal, and neuromotor fitness in apparently healthy adults: guidance for prescribing exercise. Medicine and science in sports and exercise, 43(7), pp.1334–1359.CrossRef
Metadata
Title
Tracking Steps on Apple Watch at Different Walking Speeds
Authors
Praveen Veerabhadrappa, M.B.B.S., M.S., Ph.D.
Matthew Duffy Moran, B.S.
Mitchell D. Renninger, B.S.
Matthew B. Rhudy, Ph.D.
Scott B. Dreisbach, B.S.
Kristin M. Gift, B.S.
Publication date
01-06-2018
Publisher
Springer US
Published in
Journal of General Internal Medicine / Issue 6/2018
Print ISSN: 0884-8734
Electronic ISSN: 1525-1497
DOI
https://doi.org/10.1007/s11606-018-4332-y

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