Hydration for Hot Yoga: What to Drink Before, During, and After Class

Why might a heated class leave you more drained than a regular workout?

A heated room during a yoga session can turn an already sweaty practice into one of the highest fluid-loss activities in your week. Between the movement, the heat, and a studio held near body temperature, you may sweat more and for a longer amount of time than you would in a normal class, which means you can lose  more than just fluid, but electrolytes too.¹,²

Staying properly hydrated is important for helping your body regulate its core temperature, and heat exposure can place additional demands on that system.¹,³ The fix usually isn't just "drink more water." It's drinking the right things across three moments: before, during, and after class, so you start on the mat strong and leave it that way.

What do you actually lose when you sweat in a hot yoga class?

Sweat is not just water. It's water plus electrolytes like sodium. Sodium is the primary electrolyte lost in sweat, with potassium and others lost as well.¹,⁴

That’s noteworthy when it comes to rehydrating, too**: sodium helps your body retain the fluid you drink and along with potassium maintain fluid balance, so the electrolyte you sweat out most is also one that helps you hold onto what you replace.²,⁵**

Mild dehydration can occur before you feel thirsty,, which can make it easy to fall behind before you notice.2,6 Thirst is a possible sign of mild to moderate dehydration.† In a heated class, replacing what your body is losing may mean reaching for more than just plain water.

† If you have any underlying health concerns, or if this sign persists, please consult a healthcare professional. 

Does water alone fully rehydrate you after hot yoga?

Water replaces the fluid you lose during exercise, but after a sweaty session, you may also need to replace electrolytes—especially sodium. Sodium can help your body retain the fluid you drink, making it an important part of rehydration when sweat losses are substantial.2,7

Rehydrating well isn't only about electrolytes, either. Research on beverage hydration shows that pairing fluids with carbohydrate and electrolytes can improve how effectively a drink hydrates compared with plain water.2,7-10 Even mild dehydration of roughly 1 to 2 percent may affect mood, focus, cognitive performance, and reduced energy.¹¹,¹² The takeaway: an electrolyte-balanced solution is clinically proven to hydrate you faster than water alone9, which is where Liquid I.V.® Hydration Multiplier® **can fit an after-class routine.**How should you hydrate before a hot yoga class?

Make hydrating before class your habit. A common mistake many people make is walking into a hot yoga workout already behind on fluids and trying to catch up mid-class, which is hard to do in a heated room.

Drinking steadily with water in the hours beforehand may help you start with a fuller tank, and topping off with an electrolyte drink can replace both fluids and sodium before you sweat. Because sodium supports fluid retention, consuming sodium with water can help the body retain more of the fluid than drinking water alone..²,⁵

Can you drink during hot yoga without cramping your practice?

During class, take small, steady sips rather than big gulps, since large volumes at once can sit heavy in deep inversions and twists. Room-temperature or cool water is often easiest mid-practice. If your class runs long, or you tend to be a heavy sweater, an electrolyte drink may help, because you can be losing electrolytes the whole time, not just water, and sodium is the primary electrolyte lost in sweat.¹,⁴ During-class hydration helps delay dehydration by replacing some of the fluid lost through sweat. Any remaining fluid and electrolyte deficit can then be replenished after class.

What should you drink after hot yoga?

The "after" is often the highest-leverage moment of the three. This is where replacing both fluids and electrolytes can make the biggest difference in how you feel the rest of the day. After class, rehydrate with water plus electrolytes rather than plain water alone.²,⁷

This is also where the two Liquid I.V. Hydration Multiplier® options split by preference. Original Hydration Multiplier® delivers faster hydration than water alone, and is a commercial ORS designed to support water absorption and rehydration with a combination of electrolytes and sugar, where the glucose is functional rather than an ingredient to apologize for.⁹,¹³,¹⁴

For a no-sugar option, Hydration Multiplier® Sugar-Free is clinically proven to hydrate faster than water alone using a Patent-Pending Amino Acid Allulose Blend9,15, and is keto-friendly. It can also help you stay hydrated longer, retaining more fluid than water alone for up to 4 hours.*¹⁰

What should you look for in a hot yoga hydration drink?

Before any product enters the picture, a few criteria may actually matter for a heated class:

• Sodium is the electrolyte you lose most in sweat⁶ and the one that drives fluid retention, so look for a meaningful level, not a trace. For reference, Liquid I.V. Hydration Multiplier and the Sugar-Free version both provide about 500 mg sodium and 370 mg potassium, roughly 870 mg total electrolytes per serving. (Source: product Nutrition Facts.)

• A sugar profile that fits your practice. A sugar-based oral rehydration solution can help drive rapid water absorption and replenish glycogen stores after a heavy sweat session, while a sugar-free option also helps drive rapid water absorption, but may suit someone who prefers to limit their sugar intake.9

• Single-serving convenience. A format you can keep in a gym bag and use at the studio, like a single-serving powder stick.

• A readable ingredient list. One you can scan and understand at a glance.

• A tested whole formula. Look for a product whose finished formula has been studied, not just a list of ingredients that sound good.

How does Liquid I.V.® line up with what to look for in a hot yoga drink?

When it comes to electrolytes, Hydration Multiplier® delivers 3x the electrolytes of the leading sports drink, covering the sodium you may lose most in sweat along with potassium. Original Hydration Multiplier® and Hydration Multiplier® Sugar-Free are clinically proven to hydrate faster than water alone9. When it comes to sugar profile, Original Hydration Multiplier® meets ORS standards13,14, while Hydration Multiplier® Sugar-Free uses its Patent-Pending Amino Acid- Allulose Blend to achieve faster hydration without requiring glucose.9.

Both come as travel-friendly, single-serving sticks, are formulated without caffeine, and use recognizable ingredients. Hydration Multiplier® delivers 8 vitamins and nutrients, with a finished formula studied across Liquid I.V.'s clinical program. You can shop all Liquid I.V. hydration sticks here to compare the lineup.

Making hydration a part of your hot yoga practice

A heated class might be one of the sweatiest, most electrolyte-draining things in your week, and treating hydration as an afterthought may be why so many people leave feeling drained.11,12 In a heated room you’re likely to lose fluids and electrolytes, sodium being the most prominent.1,4 After heavy sweating, water alone may not fully replace what you’ve lost; electrolytes can help replenish sodium and other electrolytes lost in sweat and support rehydration.1,2,4

Support your practice by working a clear before, during, and after hydration habit into your routine, with an electrolyte drink doing the rebuilding. **So until now, fast hydration had always needed sugar (an ORS by definition - Hydration Multiplier).13,14 But now there's also a fast, sugar-free hydration solution. Liquid I.V.® developed a proprietary amino acid-allulose blend backed by award-winning science that doesn't just sweeten, but also supports faster hydration than water alone without needing sugar (Hydration Multiplier Sugar-Free).**9,15
Ready to build it in? Explore the Hydration Multiplier® collection.

Frequently Asked Questions

Should I drink water or electrolytes for hot yoga? Both may help. Water replaces fluid volume, but because you can sweat out electrolytes too, water alone may not be enough to rehydrate effectively. In a heated class, pairing water with sodium and other electrolytes may help you rehydrate more completely.2,5,14 Keep it situational to how heavily you sweat.

How should I hydrate before hot yoga? Hydrate steadily with water in the hours leading up to class, and consider topping off with an electrolyte drink so you start with both fluids and sodium. Think of it as a general habit rather than a precise dose, and aim to arrive already well hydrated instead of catching up mid-class.

Is it okay to drink during a hot yoga class? Yes. Small, steady sips tend to sit better than large amounts at once, which can feel heavy in poses. Room-temperature or cool water is often easiest mid-practice. If you run long or sweat heavily, an electrolyte drink during class may help, though most of the rehydrating usually happens afterward.

Why do I feel wiped out after hot yoga even when I drink water? Water replaces fluid, but electrolytes help replace what you lose through sweat. Replenishing sodium and other electrolytes can support fluid retention and may help you feel steadier after heavy sweating.5

What is the best thing to drink after hot yoga? Water plus electrolytes. Liquid I.V.'s Hydration Multiplier is a commercial ORS designed to support water absorption and rehydration with a combination of electrolytes and sugar13,14 

 and delivers faster hydration than water alone, which makes the after-class window a strong fit for it.⁹,15

Sugar-Free or Original Hydration Multiplier® for hot yoga? Original meets ORS standards and delivers faster hydration than water alone for rapid rehydration after a heavy sweat.9,13-15 Hydration Multiplier® Sugar-Free is a no-sugar option. A 2025 randomized crossover trial supports that its Patent-Pending Amino Acid-Allulose Blend achieves significantly faster hydration than water alone without requiring glucose and can help you stay hydrated longer.*.⁹,10,15 Choose the one that fits your practice and preferences.

* Based on Bloomer et al.; retains hydration for up to 4 hours.

For educational purposes only. This content is not intended as medical advice. If you have underlying health concerns, or symptoms that persist, please consult a healthcare professional.

References

1. Baker LB. Physiology of sweat gland function: the roles of sweating and sweat composition in human health. Temperature (Austin). 2019;6(3):211-259.

2. Sawka MN, Burke LM, Eichner ER, Maughan RJ, Montain SJ, Stachenfeld NS. American College of Sports Medicine position stand. Exercise and fluid replacement. Med Sci Sports Exerc. 2007;39(2):377-390.

3. Sawka MN, Montain SJ, Latzka WA. Hydration effects on thermoregulation and performance in the heat. Comp Biochem Physiol A Mol Integr Physiol. 2001;128(4):679-690.

4. Baker LB, Wolfe AS. Physiological mechanisms determining eccrine sweat composition. Eur J Appl Physiol. 2020;120(4):719-752.

5. Maughan RJ, Leiper JB. Sodium intake and post-exercise rehydration in man. Eur J Appl Physiol Occup Physiol. 1995;71(4):311-319.

6. Greenleaf JE. Problem: thirst, drinking behavior, and involuntary dehydration. Med Sci Sports Exerc. 1992;24(6):645-656.

7. Loo DDF, Zeuthen T, Chandy G, Wright EM. Cotransport of water by the Na+/glucose cotransporter. Proc Natl Acad Sci U S A. 1996;93(23):13367-13370.

8. Millard-Stafford M, Snow TK, Jones ML, Suh H. The Beverage Hydration Index: influence of electrolytes, carbohydrate and protein. Nutrients. 2021;13(9):2933.

9. Gopalakrishnan ST, Kooima PK, Kavouras IE, et al. Novel allulose amino acid-containing sugar-free beverage results in rapid ad-libitum rehydration following exercise-induced dehydration. Med Sci Sports Exerc. 2025;57:789-790.

10. Bloomer R, Lelko M, et al. Oral rehydration solutions improve measures of hydration over a 4-hour period in healthy men and women. Curr Dev Nutr. 2025;9:106656.

11. Armstrong LE, Ganio MS, Casa DJ, et al. Mild dehydration affects mood in healthy young women. J Nutr. 2012;142(2):382-388.

12. Ganio MS, Armstrong LE, Casa DJ, et al. Mild dehydration impairs cognitive performance and mood of men. Br J Nutr. 2011;106(10):1535-1543.

13. National Cancer Institute. Definition of oral rehydration solution. NCI Dictionary of Cancer Terms. Accessed August 20, 2026.

14. Pérez-Castillo ÍM, Williams JA, López-Chicharro J, Mihic N, Rueda R, Bouzamondo H, Horswill CA. Compositional aspects of beverages designed to promote hydration before, during, and after exercise: concepts revisited. _Nutrients._2024;16(1):17. doi:10.3390/nu16010017.

15. Manuscript in preparation.