Have TSS, and Acute (ATL) and Chronic Training Load (CTL) all have the same Y axis scale.
Since the PMC is supposed to be an "at a glance" chart, it will be much more intuitive to see if a day's workout is above / below the ATL/CTL plots if they all were on the same scale.
I see that this idea has been offered up before but declined in 2014. Since I no rationale was given, I thought I would bring it up again in the hope that with the all the changes you have made to TrainingPeaks it would be an easy enhancement.
Anonymous
shared this idea
Great question. We’ve continued to ponder this. We use a different Y-axis scale to display TSS, ATL and CTL so that a user is better able to discern the (relatively) small changes in CTL which are key to tracking training performance. If the TSS scale was the same as ATL and CTL, the larger changes and thus scale of TSS would likely make it difficult to easily monitor changes in CTL.
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Tom Hampton
commented
While I agree with the concern in the arbitrary sense....Per the workout design recommendations from Mr. Friel (in this article: http://www.joefrielsblog.com/2015/06/part-2-training-stress-scoreso-what.html), workouts should be scaled based on current CTL, as follows:
Hard workout—add 50 to 100% to CTL
Moderate workout—add 10-30% to CTL
Easy workout—subtract 20-30% from CTL
Within these specific confines plotting workout TSS on the same scale as CTL/ATL should be workable because you are limiting the scale differential to 2x between TSS and CTL. With that approach, Hard workouts will be MAX scale, and CTL will be mid-scale. Any workouts which are above max scale (2x CTL) could be color coded to indicate that the real value is well off scale.
This approach would allow us to visually see which workouts are increasing fitness (>>CTL) and which are maintaining (or not) current fitness (<= CTL). it also gives visual clues as to which workouts may be too intense for current fitness (>>2x CTL)....color coded, and visually obvious as being OFF-SCALE.