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Tips & Best Practices

Advised Aggregations

  • Activity count
    • for general day tracking, we recommend 1-minute aggregation.
  • Heart rate
    • for general day tracking, we recommend 1-minute aggregation.
  • Steps
    • as we only receive steps when they are detected, we recommend aggregating them by summing the steps within each minute.

Meaningful day of data

If a user only wears the NOWATCH device for 5 minutes in a day, that is not considered to be sufficient wear time to represent a day and therefore no day-level metrics should be extracted for that day.

We suggest a simple heuristic on whether to consider the data for that day (if there is at least 6 hours of awake data):

  • Aggregate HR and Activity Count data by the minute (its average);
  • Only consider one day of data if there are at least 360 rows with HR data where activity_count > 250;

Daily value benchmarks

Although these significantly vary and these were obtained studying our population of users, we have some practical guidelines about our product. 

Note that these were measured on non-athletes and may therefore not be appropriate for all lifetstyles (like professional athletes):

  • High Load: Stress Duration: >= 3 hours (too much stress);
  • Delayed recovery: Average Stress Recovery >= 30 minutes (recovery too slow);
  • Heightened sensitivity: Stressor Frequency >= 6x (too many stressors);
  • Depleted system: Time in low reactivity (excluding sleep): >= 90 minutes (the body is lacking resources to maintain itself in the calm zone).

More info in our Support Knowledge Base

Note

Important: For the calculation of typical values and ranges, and descriptive sentences, we only consider days with meaningful usage (at least 6 hours of awake data).