CTL
Chronic training load is a smoothed history of training load, often modeled with a 42-day time constant. It describes the model’s recent load history; it is not a direct measure of fitness or an injury-risk score.
Why does the definition matter?
A number needs a named method and an appropriate reference. Two tools can use the same label with different formulas. Read the assumptions before comparing outputs or choosing a training target.
Understand training zonesRead calculator methods