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Debunking Hydration/Dehydration - Adam Ruins Everything

harlequinn says...

At this point in time it is impossible to tell what caused these people to have cramping in an extreme endurance event in moderate heat.

We do know current data suggests it is unlikely to be from dehydration.

Khufu said:

so that time i did a 160km race in 35 degree heat with a few thousand ppl and i saw at least 100 ppl on the side of the road with severe cramps reeling in pain... all outliers?

Debunking Hydration/Dehydration - Adam Ruins Everything

harlequinn says...

No, you've pointed out what you believe were adverse outcomes from slight dehydration. These are anecdotes. You didn't measure your level of dehydration, nor did you control for all the other factors that could have caused your issues.

If it was dehydration causing you to have muscle cramps and loss of consciousness then you probably didn't have "slight dehydration", you most likely had severe dehydration. And as someone has already pointed out, the evidence for muscle cramps caused by dehydration is slim (but that doesn't mean it's not true for you).

Studies don't take into account outliers. They look at large groups of people to generate explanations for human physiological conditions. You might be a one in a billion person and react differently to dehydration than almost everyone else.

Khufu said:

no adverse outcomes? I've pointed out several adverse outcomes of very slight dehydration. In the video they use the example of sports and say hydration isn't important. So ya, if he's referring to clinical dehydration, he's basically side-stepping the fact that that's not what anyone is worried about when hydrating for sport, it's more about the intense cramping and loss of consciousness that we don't need scientific studies to confirm. Just like I don't need a scientific study to tell me to eat when I'm hungry.

Debunking Hydration/Dehydration - Adam Ruins Everything

harlequinn says...

You had to know what EAMC stands for to understand the abstract. EAMC = Exercise-associated muscle cramps.

This video does not always delineate between levels of hydration. The reality is, you are in general always "dehydrating". This is normal and has no adverse outcomes.

Clinical dehydration (what the video is really talking about) is way beyond the normal ups and downs of fluid loss while maintaining homeostasis.

Khufu said:

Lol, are you telling me science proves humans can't get dehydrated? ugh...

I'm not worried about death from dehydration while working out, but slight dehydration (2%) is enough to dramatically impair cognitive function, performance and recovery. It's just obvious in practice.

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