Why sleep belongs in the model
Sleep is not just a recovery slogan. It is a repeated behavior with both an immediate context and a longer pattern. A controlled study of young healthy men found lower daytime testosterone after one week of restricted sleep, although that small study does not define the outcome for every person.
Dr. Testo therefore avoids turning one bad night into a new permanent baseline. A daily entry can inform Today, while repeated behavior belongs in the slower-moving Base layer.
What the protocol can make actionable
- Keep sleep duration visible rather than relying on memory.
- Separate a temporary disruption from a continuing pattern.
- Place the next useful sleep action beside the check-in itself.
The useful product question is not “Was last night perfect?” It is “What pattern is forming, and what can I do next?”
A simple way to read the screen
| Product layer | Sleep meaning |
|---|---|
| Starting | The sleep state captured during assessment |
| Base | The longer pattern that changes gradually |
| Today | The current-day signal layered over Base |
This distinction is why the Home screen shows three values instead of collapsing everything into one number.