Table 6. Validity of the wrist-worn activity trackers for estimating the daily physical activity recommendations during unstructured free-living conditions (n = 51).
| Instrument |
ActiGraph wGT3X-BT |
| 10,000 steps |
|
60 min of MVPA |
| %TP |
P |
k |
|
%TP |
P |
k |
| Samsung Galaxy Watch Active 2 |
10,000 steps |
13.7 |
0.96 |
0.83† |
60 min of MVPA |
- |
- |
- |
| Apple Watch Series 5 |
15.7 |
0.94 |
0.77† |
17.6 |
0.96 |
0.87† |
| Xiaomi Mi Band 5 |
17.6 |
0.96 |
0.85† |
60.8 |
0.41 |
-0.03 |
| Xiaomi Mi Band 5a |
- |
- |
- |
2.0 |
0.84 |
0.17* |
MVPA = Moderate-to-vigorous physical activity; %TP= Percentage of total positive cases according to the recommendation; P = Proportion of agreement; k = Kappa coefficient.
a Brisk walking time (min).* p < 0.05;‡ < 0.01; and† p < 0.001.
