What is Training Stress Score?

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Training Stress Score (TSS) is a way of measuring how much stress is put on your body from a ride. TSS is calculated using Normalized Power (NP), Intensity Factor (IF) and ride duration. TSS helps to determine the best combination of workouts and rest periods.

Below is a TSS guide:

  • Below 150 - recovery for ride will likely be finished by the next day (low)
  • 150 to 300 - may be some leftover tiredness the next day, but gone by 2nd day (medium)
  • 300 to 450 - may be some tiredness Even after two days (high)
  • More than 450 - Likely be tired for several days after ride (very high)

Measuring the physical stress a ride has had will help improve the overall race performance and help make improvements to your training regiment.

TSS will show on the Edge 810, 800, 510, 500 and the Forerunner 910XT. If it does not appear as an optional data field, update the software. You will find TSS in Garmin Connect on the activity's Details page. There will be a Power section within the Details box.

For further detail on TSS, view the Training Peaks web site.

Referenced Links:

Normalized Power - http://iqc.garmin.com/eCustomer/KODSelfService/request.do?create=kb:garmin&view()=c{1b32d2f0-0043-11e1-73d0-000000000000%7D&eksObjectId=&objectType=Case&vendorKey=&objTitle=&versionId=105}

Intensity Factor - http://iqc.garmin.com/eCustomer/KODSelfService/request.do?create=kb:garmin&view()=c{436b2e50-09af-11e1-73d0-000000000000%7D&eksObjectId=&objectType=Case&vendorKey=&objTitle=&versionId=105}

Update - http://connect.garmin.com/firmware

Details - http://garmin.blogs.com/my_weblog/2010/04/garmin-connect-lets-go-over-the-new-details-page.html

TSS - http://home.trainingpeaks.com/articles/cycling/normalized-power,-intensity-factor,-training-stress-score.aspx

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