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Mixing your drinks: How to reduce the dehydrating effect of consuming beer after sport

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August 26, 2013

Beer and sports are long-time cultural partners  (Photo: Shutterstock)

Beer and sports are long-time cultural partners (Photo: Shutterstock)

"Beer is proof that God loves us and wants us to be happy!" Benjamin Franklin

Beer is often quaffed in the aftermath of a day of sports in the fellowship of friends and neighbors. Unfortunately, while it may pick up the spirits and increase the celebratory feeling, the dehydration associated with alcohol consumption can lead to tiredness and cramping muscles. A new study by a group of Australian Public Health researchers shows that many of these ill effects can be lessened by adding a pinch of sodium to your beer.

Beer is arguably the oldest prepared drink of mankind, dating back to the Early Neolithic and the domestication of grains. While long being considered a refreshing drink, the cruel truth is that beer, together with all forms of alcohol, serves to dehydrate the human body. Despite its oft-touted nutrients, a good beer is probably the last thing one should be imbibing after a good course of exercise.

For most forms of alcohol, this doesn't present a problem. Very few people seek a fine glass of Chateau d'Yquem after a good game of soccer, or a selection of single malt whiskies to finish up a day of digging garden trenches. However, the social connection between exercise, groups, and beer cannot be denied. It is as much a part of our shared heritage as is the sacred right of any person to make a fool of themselves.

Now, the constant march of technology has finally entered into this most treasured arena. A group of public health researchers at Griffith University in Australia have determined that many of the ill effects associated with beer, particularly following exercise, can be alleviated simply by adding electrolytes to the brew.

A cohort of seven male volunteers exercised on stationary cycles until losing about two percent of their initial body weight. At this point, they were given (randomly) about two and a half pints of one of four combinations to drink:
  • Light beer (2.3 percent alcohol)
  • Light beer/sodium (25 millimoles/liter sodium, or about 1.5 g of salt per liter)
  • Beer (4.8 percent alcohol)
  • Beer/sodium (25 millimoles/liter sodium)

At the end of four hours, the researchers found that the subjects consuming the light beer with sodium had the best fluid balance, having lost only about one kilogram (2.2 lb) of fluid over the course of the experiment. The addition of sodium did not offer much protective effect for the full-strength beer, which caused an overall loss of about 1.6 kg (3.5 lb) of fluid in both cases.

The conclusion of the researchers, slightly paraphrased, is that if you are going to do this silly thing (drink beer after exercise), then at least do it right by adding a bit of salt to a light beer to reduce dehydration. Oddly, the authors of the study have no public comment about the effects of added electrolytes on hangovers, or on the possible benefits of adding sodium to stronger drink. Curious minds want to know.

Source: International Journal of Sports Nutrition and Exercise Metabolism

About the Author
Brian Dodson From an early age Brian wanted to become a scientist. He did, earning a Ph.D. in physics and embarking on an R&D career which has recently broken the 40th anniversary. What he didn't expect was that along the way he would become a patent agent, a rocket scientist, a gourmet cook, a biotech entrepreneur, an opera tenor and a science writer.   All articles by Brian Dodson
13 Comments

The salty snacks being served alongside beer should do just fine then.

sk8dad
26th August, 2013 @ 12:17 pm PDT

Alcoholics will say anything to continue with their addiction.

RichDavis
26th August, 2013 @ 01:18 pm PDT

How many alcoholics play regular sport? Certainly explains the point of pretzels.

Ozuzi
26th August, 2013 @ 08:09 pm PDT

Instead of drinking alcohol which dehrydates athletes, they should be drinking something that rehydrates athletes. Isn't this the reason that Gatorade (and other sports drinks) was created? They should save the alcohol for times when they don't need to be rehydrated, IMO.

BigGoofyGuy
27th August, 2013 @ 07:01 am PDT

Did they explain if these changes are related with the ingredients used in brew? We guess that a predominancy of certain grain(s) would change the electrolyte concentration, thus have an effect on dehydration.

Anyway, we'll gladly do our own research... we'll keep you posted!

Charlie Channels
27th August, 2013 @ 07:44 am PDT

I don't drink alcoholic drinks when I am doing something active like backpacking and such. But even when I do drink, I always go with the 1:1 rule and have some sort of non-alcoholic drink with, say, my beer.

Rann Xeroxx
27th August, 2013 @ 09:19 am PDT

Wow... another study to tell us a "brand new fact" that has been common knowledge, well, for at least MY lifetime!

Mike Barnett
27th August, 2013 @ 10:07 am PDT

Some research efforts obviously more useful than others. This one clearly validates traditional bar food! Have a beer or two, have some pretzels & chicken wings, ala the Anchor Bar of Buffalo, NY, and move on!

StWils
27th August, 2013 @ 10:57 am PDT

Eye, ears salt in yer beer!

Fritz Menzel
27th August, 2013 @ 11:17 am PDT

Caffeine and alcohol drinks are not "dehydrating"... just understand that they just don't hydrate *as well as water*. This is from our sports nutrition professor at medical school. These types of drinks operate at about the 85%-90% efficiency of water. If you drink a 32oz cola, you will get the same hydration as drinking 28oz of water.

People get confused and think that drinking caffeinated beverages can't hydrate you after exercise, but they will.

Granted, there are better options for fully hydrating than caffeinated beverages or alcohol, but they WILL hydrate you, just not as efficiently.

Dr. Rings, MD

Matt Rings
27th August, 2013 @ 12:19 pm PDT

I have the answer to this whole issue.

JUST DON'T EXCERCISE!!!

Now someone get me a beer....

BP
27th August, 2013 @ 07:18 pm PDT

More than 0.5 grams of salt per liter water is not regarded as potable water.

More than 2.0 grams of salt per liter water is not regarded as acceptable for crop irragation.

The salty bar food came about to sell more beer, not to keep anyone hydrated.

Keep my salt on the pretzels or peanuts, don't put it in my beer, cripes.

Oh "light beer" ptttt.

Dave B13
29th August, 2013 @ 07:47 am PDT

7 volunteers.

7

Not a great sampling. Conclusion: Junk Science

Some Guy
29th August, 2013 @ 01:50 pm PDT
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