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Table 1 Step Counts and Errors for Different Speeds

From: Tracking Steps on Apple Watch at Different Walking Speeds

Variable Slow (1.9 mph) Moderate (3.0 mph) Brisk (4.0 mph) Jogging (5.2 mph)
  Mean ± SD Min-max Mean ± SD Min-max Mean ± SD Min-max Mean ± SD Min-max
Video counts, steps 560 ± 38 443–722 680 ± 32 601–755 783 ± 63 695–998 941 ± 47 830–1073
Apple Watch, steps 574 ± 38 469–669 686 ± 41 574–760 795 ± 69 631–1023 908 ± 54 781–1050
Relative error in Apple watch, steps % − 2.6 ± 5.6 − 22–17.8 − 0.9 ± 5.1 − 23.4–16.9 − 1.6 ± 4.2 − 13.7–15.4 3.4 ± 4.8 − 15.9–16.2
Absolute error in Apple watch, steps − 13.8 ± 30.5 − 98.5–101.50 − 6.0 ± 34.7 − 143–123 − 12.1 ± 33.2 − 106–132 33.0 ± 45.5 − 144–159.5