Table 3. Pearson’s correlation coefficient (r) between the absolute differences and the individual means.
| Instrument |
Slow pace walking
(steps) |
Normal pace walking
(steps) |
Brisk pace walking
(steps) |
Running
(steps) |
|
Study 1 (n = 56) |
| Samsung Pedometer |
0.37‡ |
0.00 |
0.23 |
0.04 |
| Samsung Pacer |
0.30* |
-0.06 |
0.09 |
0.23 |
| Samsung Google Fit |
0.31* |
0.01 |
0.09 |
0.22 |
| Apple iPhone appsa |
0.11 |
0.06 |
0.20 |
0.06 |
| Samsung Galaxy Watch Active 2 |
0.16 |
0.03 |
-0.04 |
0.07 |
| Apple Watch Series 5 |
0.11 |
-0.08 |
-0.14 |
-0.07 |
| Xiaomi Mi Band 5 |
0.02 |
-0.37‡ |
-0.38‡ |
-0.14 |
|
Study 2 (n = 51) |
| Samsung Galaxy Watch Active 2 |
0.21 |
- |
0.54† |
- |
| Apple Watch Series 5 |
-0.01 |
-0.16 |
- |
- |
| Xiaomi Mi Band 5 |
0.39‡ |
0.55† /0.22a |
0.62† /0.51† b |
- |
MVPA = Moderate-to-vigorous physical activity; PA = Physical activity; Study 1: Validity in structured free-living conditions; Study 2: Validity in unstructured free-living conditions;
a Brisk walking time (min);
b Slow-Brisk walking time (min);
a Apple iPhone apps is referred to the three apps activated in the iPhone mobile (i.e., Pedometer, Pacer, and Apple Health).* p < 0.05,‡ p < 0.01, and† p < 0.001
