Training

Each ride with power carries a training stress value once your Threshold is established; an hour at exactly your Threshold is 100. Three metrics are computed from daily training stress:

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 your power relative to your Threshold (Threshold). Rides without power carry none.

There is one Threshold. CAL uses the value in effect when you started the ride. 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 (Threshold).