Capacity
What can the heart, lungs and muscles repeatedly support at a given stage?
Nebula combines physiology, movement practice and reflective review into a usable editorial framework.
See research notes
What can the heart, lungs and muscles repeatedly support at a given stage?
Can the athlete express range, balance and force without unnecessary compensation?
How do sleep, work, climate, history and motivation shape the session?

Rather than treating a workout as a verdict, we treat it as a small experiment with a purpose, a dose and a recovery window. The result is information about the person and the plan.
| Signal | Useful question | Possible response |
|---|---|---|
| Breathing rises early | Is the pace appropriate today? | Reduce intensity and observe. |
| Joint discomfort | Does technique or range need review? | Stop the aggravating movement and seek guidance. |
| Stable energy | Can volume progress modestly? | Change one variable, not several. |