TrainingPeaks represents Fatigue (ATL) in purple font and the purple line (in the Performance Management Chart) throughout the TrainingPeaks ecosystem.
What is Fatigue (ATL)?
Acute Training Load (Fatigue) combines duration and intensity to provide a value of how much an athlete has recently trained. TrainingPeaks calculates ATL, by default, as the exponentially weighted average of daily TSS for the past 7 days. Note that, in effect, ATL represents the training an athlete has done in the past two weeks given the nature of exponentially weighted averages.
ATLtoday = ATLyesterday + (TSStoday - ATLyesterday)(1/ATL time constant)
How do I find my ATL (Web app)?
You can find ATL in several places on the TrainingPeaks Web App.
On the Workout Card
On the Weekly Summary
On Athlete Home
On the Dashboard Chart
On Coach Home (TrainingPeaks Coach Account Only)
How do I find my ATL (Mobile App)