Comments on: Sports Drinks and Dehydration http://www.lonegunman.co.uk/2009/08/19/sports-drinks-and-dehydration/ Mon, 19 Dec 2011 14:29:41 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Lloyd Morgan http://www.lonegunman.co.uk/2009/08/19/sports-drinks-and-dehydration/comment-page-1/#comment-2015 Lloyd Morgan Fri, 21 Aug 2009 07:04:28 +0000 http://www.lonegunman.co.uk/?p=3553#comment-2015 In the comments, the author, Gretchen Reynolds, actually says of urine tests: <blockquote>It is true, however, that the single best measure of water loss during activity is not urine concentration. The best measure is weight fluctuation. If you weigh yourself or your child immediately before and immediately after exercise, taking into account just how much fluid has been ingested during the exercise, you can estimate fairly accurately how much body water has been lost. In general, two pounds of weight loss is equivalent to about 1 quart of lost body water.</blockquote> And I suppose that yes, it is quite unscientific given that multivitamins can alter its colour (not to mention various foods—beetroot, for example). In the comments, the author, Gretchen Reynolds, actually says of urine tests:

It is true, however, that the single best measure of water loss during activity is not urine concentration. The best measure is weight fluctuation. If you weigh yourself or your child immediately before and immediately after exercise, taking into account just how much fluid has been ingested during the exercise, you can estimate fairly accurately how much body water has been lost. In general, two pounds of weight loss is equivalent to about 1 quart of lost body water.

And I suppose that yes, it is quite unscientific given that multivitamins can alter its colour (not to mention various foods—beetroot, for example).

]]> By: Reilly http://www.lonegunman.co.uk/2009/08/19/sports-drinks-and-dehydration/comment-page-1/#comment-2007 Reilly Wed, 19 Aug 2009 23:50:39 +0000 http://www.lonegunman.co.uk/?p=3553#comment-2007 I've found the urine colour test to be not very useful if you take multivitamins (and at least intuitively, that seems like a good idea). Like it says in the PDF, "Certain medicines and vitamins may cause the colour of the urine to change." Every multivitamin I've tried does this. I’ve found the urine colour test to be not very useful if you take multivitamins (and at least intuitively, that seems like a good idea). Like it says in the PDF, “Certain medicines and vitamins may cause the colour of the urine to change.” Every multivitamin I’ve tried does this.

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