Glossary: Training strain

The training strain calculates the risk of overtraining by combining training monotony and the sum of all TRIMP values for a given period. The risk of overtraining has an individual limit for every single athlete.

Runalyze tries to estimate the athlete's limit by current ATL and gives a coloured (green/orange/red) feedback.

Monotony = average(TRIMP) / (stddev(TRIMP) + average(TRIMP))
Training Strain = sum(TRIMP) * Monotony / 0.5

Update 2025:
Monotony calculation has been updated to prevent sensitivity to higher levels of monotony. As a result, the calculation of Training Strain was also adjusted slightly.

See also

• TRIMP
• ATL
• CTL
• Monotony

References

1. Fellrnr.com - Training Strain

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