Explain why a long distance runner should choose an isotonic drink rather than cola

  • 3 votes

Explain why a long distance runner should choose an isotonic drink rather than cola.

I know that sports drinks differ from ordinary soft drinks as it contains mainly water and also sugar (often glucose).

Is is because an isotonic drink contains more mineral ions than most drinks?

Posted Thu 11th April, 2013 @ 12:14 by Sharon

2 Answers

  • 3 votes

Indeed :)

The term "Isotonic" means "the same concentration", so an isotonic drink will contain the same concentration of mineral ions (e.g.- pottasium, magnesium, iron etc.) as your own body. This is to make sure that there is no osmotic gain or loss in the cells of the body

In answer to your question, a long distance runner should choose an isotonic drink rather than cola because the drink will provide and replace the lost mineral ions through sweating and breathing. The isotonic drink has the same concentration of minerals in body as it does in the drink whereas the cola will not replace any of the ions lost from the body (it'll just replace a bit of glucose).

Hope this helped you out a bit :) x

Answered Sat 24th August, 2013 @ 12:16 by Aishwarya
  • 0 votes

Yes it is the mineral ions that makes the sports drink better. They make sure that the concentration of body fluids remain the same even if lots of whater is lost from cells.

sorry I haven't explained that very well..

Answered Thu 11th April, 2013 @ 12:44 by Millie