What is training strain?

Training strain = training volume x training monotony (weekly mean divided by SD). It captures the combined effect of how much you train and how monotonous that training is.

What strain value indicates overreaching risk?

Foster suggested above 6000 AU per week strain combined with illness or performance decrement suggests overreaching. Trained athletes may tolerate higher strain without ill effects.

How does strain relate to ACWR?

Both quantify training load-related risk but from different angles. ACWR focuses on acute vs chronic load ratio; strain captures monotony within the current week. Together they provide a more complete picture.

Training Strain (Foster Model) Calculator

Calculate training strain = total weekly load x training monotony. High strain values above 6000 AU indicate elevated overtraining risk.

Core Tools

Distance covered in 12 minutes (meters)

🏅 Sports Note: These calculators provide estimates based on population data and validated formulas. Individual results vary by physiology, training level, and testing conditions. Consult a qualified coach or sports scientist for personalized guidance.

How to Use

Enter the values for the scenario you are assessing. Calculate training strain = total weekly load x training monotony. High strain values above 6000 AU indicate elevated overtraining risk. Use the training strain result to inform your calculation.

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Frequently Asked Questions

What is training strain?

What strain value indicates overreaching risk?

How does strain relate to ACWR?