PHYSIOLOGY DESK
Understand the response, not just the result.
Physiology gives language to adaptation, but a single reading is never the whole story.
Core concepts
| Concept | Useful question | Common limit |
|---|---|---|
| Heart rate | How does effort feel at this output? | Heat, stress, medication, and sleep can alter it. |
| Ventilation | Can speech remain comfortable? | Breathing changes have many possible causes. |
| Recovery | Does the next day feel ordinary? | One poor night is not a diagnosis. |
Read the pattern
Navlin articles encourage readers to compare repeated observations rather than chase a perfect number. Keep notes simple: activity, perceived effort, conditions, and how you felt later. This creates a more honest record for personal reflection or a conversation with a qualified professional.
Measurements become useful when they improve attention rather than anxiety.Visit the journal