| data_type | description | files |
| time | Timestamp of sample collection | ecg.csv; eda.csv; fitbit_heart_rate_per_minute.csv; fitbit_heart_rate_per_second.csv |
| ecg | Electrocardiogram waveform | ecg.csv |
| eda | Electrodermal activity | eda.csv |
| heart_rate | Heart rate measured per second and per minute | fitbit_heart_rate_per_second.csv; fitbit_heart_rate_per_minute.csv |
| heart_rate_zones | Daily summary of heart rate zones | fitbit_heart_rate_summary.csv |
| questionnaires | Perceived stress and anxiety scores | pss_14.csv; stai.csv |
| demographics | Participant demographic data | participants.csv |