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Durations of data collection.
| Instrument used | Time 1: baseline (first week) | Time 2: intervention start (fourth week) | Time 3: intervention end (eighth week) | Total |
| Accelerometry (days) | 7 | 7 | 7 | 21 |
| Beck Anxiety Inventory for the past 7-day anxiety assessment | Days 1 and 7 | Days 1 and 7 | Days 1 and 7 | 6 times |
| Daily anxiety assessment (days) | 7 | 7 | 7 | 21 |
| Survey for physical activity app use | N/Aa | Day 7 | Days 1 and 7 | 3 times |
aN/A: not applicable.
