Exercise Oxygen Saturation Estimator

Why does SpO₂ drop during exercise?

During intense exercise, muscles demand more oxygen. In some individuals, the rapid transit of blood through the lungs limits the time available for full oxygenation.

Formula: Est. SpO₂ = Resting SpO₂ - (Intensity Coefficient)

Athlete Example

An endurance athlete with a 99% resting SpO₂ performing maximal sprints may see a drop of 5-7%.

Step-by-step calculation:

• Identify baseline resting SpO₂ (e.g., 98%)
• Determine intensity level (e.g., High)
• Subtract the coefficient (98% - 4% = 94%)

Frequently Asked Questions

Is a drop in SpO₂ normal?

A slight drop (1-3%) is common. Significant drops (below 92%) are known as Exercise-Induced Arterial Hypoxemia (EIAH).

What factors affect these levels?

Altitude, underlying lung health, and cardiovascular fitness levels significantly impact oxygen saturation during exertion.