Sports physiology, translated with care.
Signals, not verdicts
Heart rate, breathing, pace, power, and perceived effort describe different parts of an effort. Their meaning depends on conditions, history, and the question being asked.
Useful interpretation
We introduce the language of physiology so readers can have clearer conversations with coaches and clinicians. Educational context is not a diagnostic service.
A compact reference table
| Signal | What it may describe | What to consider |
|---|---|---|
| Heart rate | Internal cardiovascular response | Heat, hydration, stress, medication, and sleep |
| RPE | The athlete’s lived effort | Honesty and familiarity with effort levels |
| Pace or power | External work output | Terrain, equipment, wind, and fatigue |