Do you really need to drink eight cups of water a day?

[Vicsetter]

Drinking eight cups or two litres of water a day is longstanding advice. But is there any scientific basis for it, asks Dr Chris van Tulleken.

http://www.bbc.co.uk/news/magazine-24464774

Turns out the advice to drink so much water was sponsored by a mineral water manufacturer - so don't believe everything you read.

 

[HOBIE]

Hydration is very important for folks. I drink tea for England

 

[Steff]

I've drunk 3 litres a day for 5 years now and it's gonna stay this way

 

[Northerner]

How Much Should You Drink During a Half Marathon?

If you?re debating your fueling strategy for an upcoming half marathon, a new study suggests that the two most recommended approaches?drinking when you?re thirsty and following a set hydration plan?are both effective.

Canadian researchers had 10 trained runners complete two half marathons on a treadmill in hot conditions (86 degrees, 42 percent humidity). During one half marathon, they drank when they felt thirsty. During the other, the runners followed a set fluid plan designed to prevent them from losing more than 1 percent of their body weight through sweat. Previous research suggests that performance falters if you lose 2 percent or more of your body weight.

http://www.runnersworld.com/drinks-hydration/how-much-should-you-drink-during-a-half-marathon