Running Glossary

Training Stress Score (TSS)

Running Glossary

Training Stress Score (TSS)

Running Glossary

Training Stress Score (TSS)

Training Stress Score (TSS)

[tray-ning stres skor]

Phonetic (Standard)

/ˈtreɪnɪŋ strɛs skɔr/

IPA

Noun

A numerical value that quantifies the overall training load and intensity of a workout, based on duration and intensity relative to an individual's fitness level.

Training Stress Score (TSS) quantifies the training load of a workout based on intensity and duration. It helps runners balance training and recovery to avoid overtraining. TSS is calculated using heart rate, power, or pace data, with 100 TSS points equating to an hour at lactate threshold. For example, a 2-hour run at moderate intensity might yield 120 TSS. It matters because it allows runners to plan training cycles, ensuring optimal performance and reducing injury risk. By tracking TSS, athletes can adjust their training to meet specific goals and maintain overall fitness.

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