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Paige is running on a treadmill wearing a sealed mouthpiece until he is exhausted. which test is paige performing?

User Nurqm
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I would say that Paige is performing a test to check his lung functioning since running on a treadmill will elevate his breathing and enable him and the doctor to see if there is anything unusual about it ie is there shortness of breath for example.
User Nikhil Aneja
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