TSS (Training Stress Score)

TSS is an estimate of the training load created by a workout based on intensity and duration.  A 1-hour cycling activity at maximum steady-state intensity is 100 TSS (111 for running). TSS can be used to determine how much recovery may be needed after a given workout.  TSS is also used to calculate Fitness (CTL) an Fatigue (ATL) in the Performance Manager Chart

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