Fitness, Fatigue, and Form are three ways of viewing your recorded cardio-load pattern. They are modelled values, not direct measurements of aerobic fitness, physical tiredness, readiness, injury risk, or performance.
Fitness is the longer-term pattern
Fitness reflects the longer-term direction of your recorded cardio training. It usually changes more gradually than Fatigue.
A rising value means the training load in your record has been building. A falling value means recent training is lighter than the longer-term pattern. Neither direction is automatically good or bad. A build, maintenance phase, taper, and recovery period should not all look the same.
Fatigue is the recent pattern
Fatigue responds more to recent cardio load. Demanding or closely spaced sessions can raise it, while lighter training and rest allow it to ease.
The label does not mean Zolt knows how tired you feel. Strength training, sleep, illness, soreness, work stress, and other demands may affect you without being fully represented in this cardio model.
Form is the relationship
Form helps show how the recent pattern relates to the longer-term pattern. A more negative direction generally accompanies recent load that is high relative to the longer-term pattern. A more positive direction generally accompanies lighter recent load.
That is context, not a verdict. More negative is not always bad, and more positive is not always good.
Read the pattern in context
| Situation | A practical interpretation |
|---|---|
| Planned training build | Fitness may rise while recent load keeps Fatigue elevated |
| Recovery period | Fatigue may ease sooner while Fitness changes more gradually |
| Taper | Form may move in a more positive direction as recent load becomes lighter |
| Missed training | The chart may resemble a taper even when the change was not intentional |
These are examples, not predictions. Compare the chart with the training you actually completed and with how you feel.
What the values leave out
The view depends on supported workouts and the heart-rate data available for them. Missing sessions, incomplete heart-rate records, duplicate workouts, or incorrect zone settings can change the pattern.
The values also do not capture every kind of training or life stress. Use them alongside your plan, perceived effort, symptoms, sleep, and recovery context.
How to use the view
- Check that the workout record is complete.
- Look at direction across several days, not one isolated value.
- Compare recent load with the longer-term pattern.
- Ask whether the chart matches the phase you planned.
- Adjust training based on the full picture, not one label.
Do not use Form as medical clearance or train through pain because a value looks favorable. Seek appropriate care for chest pain, fainting, unusual shortness of breath, or other concerning symptoms.