TrainingPeaks represents Fitness (CTL) in blue font and the blue line (in the Performance Management Chart) through the TrainingPeaks ecosystem.
What is Fitness (CTL)
Chronic Training Load (Fitness) combines duration and intensity to provide a value of how much an athlete has trained historically. TrainingPeaks calculates CTL, by default, as the exponentially weighted average of daily TSS for the past 42 days (6 weeks). Note that, in effect, CTL represents the training an athlete has done in the past 3 months, given the nature of exponentially weighted averages.
Formula
CTLtoday = CTLyesterday + (TSStoday - CTLyesterday)(1/CTL time constant)
What to expect from your CTL
If you have a planned workout with TSS, then your CTL will update each day to include the planned workout(s) TSS. Once you execute your workout, if your completed TSS is different than what was planned, then the CTL will adjust accordingly.
If you do not have a planned workout, then your CTL will only update once you have uploaded a completed workout with TSS.
How do I find my CTL (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 CTL (Mobile app)
iOS
Android