I believe the answer is vitamin. I know glucose converts into vitamin C so I think that's it. I hope it helps :)
Because the more someone exerts themselves the more oxygen and carbon dioxide out put ratio is greater. The more you run and the faster you run the more oxygen you loose which is supplied to your muscles including your lungs.
Answer:
Eternity is like a deep dark hole that your falling through the problem is it is endless you keep falling and falling and you never stop falling.
Explanation:
How is that?
