CTL and ATL are components of rolling TSS/day (2x your set constant), so any differences in CTL are likely happening in TSS. If you're seeing different CTL and ATL numbers between WKO and TrainingPeaks, here are a few things you can check to find out why.
Check the athlete's functional threshold power (FTP) settings
You'll need to manually record the FTP history for each athlete to make sure it generally matches the settings in TrainingPeaks. This can be done on the Athlete Details page.
- Click the athlete’s name to open Athlete Details.
- Click the down arrow by Metrics to expand the list of metrics.
- Click the relevant sport Threshold Power item in the left column; all entries for this threshold will display in the column on the right.
- Select the time range you wish to review in the RHE (right-hand explorer); we suggest reviewing the past 30-90 days.
- Add an entry by clicking the + at the bottom of the column on the right.
- Delete an entry by clicking the - at the bottom of the column on the right.
- Edit an entry by clicking on the date or value of the entry and typing in a new date or value.
Check workout TSS
If the athlete’s FTP matches, the next step is to check workout TSS in WKO against TrainingPeaks. For any particular date, the TSS numbers of the prior 90 days affect the calculation, with the most recent 30 days carrying the most weight. A simple way to review TSS is to create a new chart with one data series: tss. If TSS doesn't match on a particular workout, this is often because the set FTP doesn't match, so give the Threshold Power history a quick check again.
Review daily IF
If your workouts' TSS match TrainingPeaks, compare the daily IF (intensity factor) numbers in WKO against TrainingPeaks. A simple way to do this is to create a new chart with one data series: if. If the daily IF numbers are not the same in WKO and TrainingPeaks, check your Threshold Power history once more, as this is usually the culprit. If your IF values are different but your threshold power history is the same, review the normalized power numbers for your recent workouts to see if those numbers match between WKO and TrainingPeaks. There should be a slight difference, as WKO calculates Normalized Power in a slightly cleaner way (it handles pauses more accurately), but the difference shouldn't be more than 2%. If you find a time range where these are more than slightly different, check the threshold power history again for that time period.
Check sport type selection
Check the sport type(s) selected at the top of the RHE (right-hand explorer). This doesn't affect the Hero Bar (the numbers at the top of the WKO screen), but it will affect some charts, so make sure you have all necessary sport types selected in the RHE, as these may cause charts to report CTL and ATL reflecting only files of the selected sport types (though many charts are built to include only the specific sport they're reporting, regardless of what sport type is selected).
Review CTL and ATL constants
Check to make sure the athlete's CTL and ATL constants match between WKO and the charts in TrainingPeaks. To see and/or change the constants in WKO, simply click on the numbers in the Hero Bar (as shown below).
Check workout quantity
Check the number of workouts to make sure all of your workouts have downloaded successfully to WKO from TrainingPeaks.