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How to Stay Hydrated in a Hot Tub


Hydrated in a hot tub? That shouldn’t be a problem. You’re surrounded by water!

Au contraire, mon frère. (That’s French for “Wrong again, Kemosabe.) Like the Ancient Mariner, being surrounded by water doesn’t mean there is a drop to drink. You need to drink water to stay hydrated whether you’re in a hot tub or on a ship lost at sea.

Why Should I Stay Hydrated?

Family Doctor.org spells it out. 

“Your body depends on water to survive. Every cell, tissue, and organ in your body needs water to work properly . . . to maintain its temperature, remove waste, and lubricate your joints. Water is needed for overall good health.”

The American Heart Association (AHA) pulls no punches either.

“Dehydration can be a serious condition that can lead to problems ranging from swollen feet or a headache to life-threatening illnesses such as heat stroke.”

Why Would I Not Stay Hydrated in a Hot Tub?

The health benefits of relaxation or therapy in a hot tub are well known. However, as we explain at the SpaExpo website, dehydration can be one of the subtle dangers of being in raised temperatures for too long.

Elevated body temperatures trigger perspiration, which can lead to dehydration. We recommend that you step out for several minutes and get a glass of water (or two) to cool down. If you feel skin tingling, dizziness, extreme fatigue, or abnormal heart rates, that could mean that your body is reaching a higher internal temperature than you may realize.

How Can I Know if I am Not Properly Hydrated in my Hot Tub?

Dizziness, sleepiness, headache, dry mouth, and disorientation are all signs of dehydration. The first sign, however, is being thirsty. The AHA warns that “Thirst isn’t the best indicator . . . If you get thirsty, you’re already dehydrated,”

What Can I Do to Stay Hydrated in my Hot Tub?

Weigh your sweat. You need to drink a pint of water to replenish every pound of perspiration you secrete.

Since you probably have no idea how to weigh your sweat (neither do we), preventive treatment is the recommended best practice.

  • Drink plenty of water before, during, and following your daily dunk. That’s water, spelled H-2-O. No alcohol or soda.
  • Sports drinks are a good idea. Energy drinks, not so much. Don’t confuse the two. You will regret it.

Finally, whether you choose water or a sports drink, do not drink from a glass container anywhere near your hot tub. That could lead to a whole other problem.

SpaExpo advocates healthy hot tubbing. Our friendly staff is at your service to help you hot tub wisely. Just give us a call at 512-459-9181.

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