Training

Each ride carries a training stress value. Three derived metrics are shown:

Metric	Definition
Fitness	Exponentially weighted average of daily training stress, 42-day time constant
Fatigue	The same, 7-day time constant
Form	Fitness minus Fatigue

Training stress is computed from power when present, otherwise estimated from heart rate. Power is measured against your Threshold, which comes from your rides; there is no manual entry.

There is one Threshold. CAL uses the current value. Once a raise is scheduled for Monday, training stress, Fitness, Fatigue, and Form use the scheduled value together and show as pending until that Monday. Until your Threshold is established, rides show no training stress (CAL).