I just did a workout and some of the intervals were shorter/longer than what was defined in the workout. Why?

Many of Xert workouts incorporate "Smart" intervals.  These intervals can have either varying intensity, varying duration or both.  For example, let's look at the Sweet-Spot Under Fatigue @82% Workout: The "Intervals under Fatigue" start with an interval that's 369W that lasts 101s.  Why 101s? Seems like an odd number to choose, [...]


Why does my training deficit and surplus change so quickly?

It is not uncommon to see your Training Deficit/Surplus increase over one day or sometime even a few hours.  Training deficit depends on your activities in the past week.  Activities don't accumulate continuously.  The deficit calculation is based your Improvement Rate and takes into account your activities from the past week. [...]

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