GMAT Critical Reasoning (CR) | Re: Many athletes inhale pure oxygen after exercise in an attempt to incre

I have one doubt. Low blood lactate level implies high muscular re-absorption of oxygen, CONSIDERING EVERYTHING ELSE REMAINS SAME, right?

How do we know that Pure oxygen does not impact some other parameter, resulting in higher muscular re-absorption of oxygen? It is certainly possible.

Hence, how can we conclude: Athletes’ muscular reabsorption of oxygen isnot increased when they inhale pure oxygen instead of normal air.

It
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