Medical disclaimer
FastWindowTimer is an informational and planning tool. It is not a medical device, and nothing on this site is medical advice.
What FastWindowTimer is — and is not
The timer, calculator, and all content on FastWindowTimer provide general information and planning estimates based on published research. We do not diagnose, treat, cure, or prevent any condition. Phase thresholds are general educational estimates that vary between individuals — they are not a measurement of your body. Nothing here should be used as a substitute for professional medical advice, diagnosis, or treatment.
In an emergency
If you are experiencing a medical emergency, call your local emergency services immediately. Do not delay seeking emergency care because of anything you have read on this site.
Published 2026-06-21. Reviewed by the FastWindowTimer editorial team. No named medical reviewer at this time.