RED-S (Relative Energy Deficiency in Sport) is a syndrome caused by low energy availability that impairs health and performance. It affects hormonal function, bone density, immune function, cardiovascular health, and psychological wellbeing in both male and female athletes.

What are the warning signs of RED-S?

Stress fractures, hormonal disturbances (loss of menstrual cycle in women, low testosterone in men), frequent illness, poor recovery, irritability, and unexplained performance decline are key warning signs.

Is RED-S only a female athlete issue?

No. While the female athlete triad was described first, RED-S affects male athletes too. Male cyclists, wrestlers, and endurance athletes show testosterone suppression and bone stress injury risk similar to female athletes with low EA.

RED-S Risk Score Calculator

Calculate Relative Energy Deficiency in Sport (RED-S) risk score using the IOC Clinical Assessment Tool, screening for low energy availability and its multi-system health consequences.

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 It Works

Calculate Relative Energy Deficiency in Sport (RED-S) risk score using the IOC Clinical Assessment Tool, screening for low energy availability and its multi-system health consequences

Each component has a specific meaning:

Screening — The screening recorded for the scenario being assessed.

Note: Interpret the red-s risk score result against the thresholds and context described above.

How to Use

Enter the screening for the scenario you are assessing. Calculate Relative Energy Deficiency in Sport (RED-S) risk score using the IOC Clinical Assessment Tool, screening for low energy availability and its multi-system health consequences. Use the red-s risk score result to inform your calculation.

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RED-S Risk Score Calculator

How It Works

How to Use

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Frequently Asked Questions

What is RED-S?

What are the warning signs of RED-S?

Is RED-S only a female athlete issue?