How Much Water Should Seniors Drink? Hydration Tips

By Kristen Nielsen, Founder & Senior Fitness Specialist

· Updated · Nutrition & Brain · 3 minute read

An older man with a gray beard in a denim shirt drinking a glass of water in his kitchen
sip, sip…
An older man with white hair and glasses drinking from a water bottle outdoors after exercise
…hooray!

Part of our guide: Nutrition After 60: What to Eat to Stay Strong

Key takeaways

  • Aim for about 9 cups (72 ounces) of fluids a day if you're a woman and about 13 cups (104 ounces) if you're a man, counting all beverages.
  • Staying hydrated supports your muscles, joints and brain, and even mild dehydration can impair concentration and memory.
  • A no-sugar electrolyte drink can help during exercise or hot weather, but check with your doctor first if you have high blood pressure, heart failure or kidney disease.

Most women need about 9 cups (72 ounces) of fluids a day and most men about 13 cups (104 ounces), counting all beverages. Because our sense of thirst tends to fade with age, it helps to drink on a schedule rather than waiting until you feel thirsty. Water is one of the simplest parts of nutrition after 60.

The more I learn about hydration and its connections to our body, brain, and balance, the more I want to share how important the simple act of drinking water is! So often, symptoms we dismiss as something far more serious or complicated can simply be linked to a lack of hydration.

Staying well-hydrated is one of the simplest yet most powerful ways to maintain our health as we age. Proper hydration supports everything from muscle and joint function to heart health and even brain performance. In this post, we'll explore why hydration is critical for older adults, share recommended daily water intake guidelines, and explain why no-sugar electrolyte supplements can be a game-changer.

Why Does Hydration Matter More as You Age?

Water plays a vital role in our bodies by supporting muscle tone, lubricating joints, and aiding in nutrient and oxygen transport. Adequate hydration helps maintain metabolic efficiency and can prevent issues like cramps, fatigue, and constipation — all common concerns as we age (Popkin, D'Anci, & Rosenberg, 2010).

An older woman with short gray hair and glasses sitting in a chair and holding her bare ankle as if it aches

Can Dehydration Affect Your Memory and Focus?

Yes. Even mild dehydration can impair concentration, memory, and cognitive performance. Our brains are about 75% water. Studies indicate that proper hydration is linked with improved attention and faster reaction times, keeping our minds sharp and focused (Benton & Young, 2015).

A thoughtful older woman in a yellow sweater tapping a pencil against her head while reading at her desk

How Much Water Should Seniors Drink Each Day?

General guidelines suggest that:

  • Women should aim for about 9 cups (72 ounces) of fluids per day from all beverages.
  • Men should aim for about 13 cups (104 ounces) of fluids per day from all beverages.

When Is an Electrolyte Drink Better Than Plain Water?

While water is essential, sometimes plain water isn't enough, especially during exercise or in hot weather. Electrolytes such as sodium, potassium, magnesium, and calcium help maintain fluid balance, nerve function, and muscle contraction. However, many commercial sports drinks contain high amounts of sugar, leading to blood sugar spikes and unnecessary calories.

No-sugar electrolyte supplements — like those offered by LMNT or Nuun — provide the minerals your body needs without the added sugars. Research shows that beverages with balanced electrolytes improve water absorption and retention, which is particularly beneficial for older adults who may experience a reduced sense of thirst. If you have high blood pressure, heart failure, or kidney disease, check with your doctor before using high-sodium electrolyte products.

A tall glass of water on a white background

Make Hydration a Daily Habit

Proper hydration is essential for maintaining muscle function, joint health, and cognitive performance. By aiming for the recommended daily water intake and incorporating no-sugar electrolyte supplements when needed, you can support overall body and brain health. Prioritizing hydration is a simple yet effective step toward a healthier, more vibrant life. Keep a water bottle handy during every workout, whether you're out for a walk or joining us for small group training. Stay hydrated!

Kristen

Try the recipe: Here's a simple recipe to make your own citrus mint electrolyte water — get the recipe.

Sources

  1. Popkin BM, D'Anci KE, Rosenberg IH. Water, hydration, and health. Nutr Rev. 2010;68(8):439-458. View source
  2. Mitchell HH, Hamilton TS, Steggerda FR, Bean HW. The chemical composition of the adult human body and its bearing on the biochemistry of growth. J Biol Chem. 1945;158(3):625-637. View source
  3. Benton D, Young HA. Do small differences in hydration status affect mood and mental performance? Nutr Rev. 2015;73(suppl 2):83-96. View source
  4. Institute of Medicine. Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate. National Academies Press; 2005. View source
  5. Maughan RJ, Watson P, Cordery PA, et al. A randomized trial to assess the potential of different beverages to affect hydration status: development of a beverage hydration index. Am J Clin Nutr. 2016;103(3):717-723. View source
  6. Phillips PA, Rolls BJ, Ledingham JG, et al. Reduced thirst after water deprivation in healthy elderly men. N Engl J Med. 1984;311(12):753-759. View source
  7. Kenney WL, Chiu P. Influence of age on thirst and fluid intake. Med Sci Sports Exerc. 2001;33(9):1524-1532. View source

This article is for general education and isn't medical advice. Please talk with your doctor before starting a new exercise, nutrition or supplement routine. See our health disclaimer.

Kristen Nielsen, Founder of TogetherWON

About the author

Kristen Nielsen

Kristen founded TogetherWON after watching what strength training could do for older adults — including her own grandparents. She's an ACE Certified Personal Trainer with 10+ years in functional aging, a University of Central Florida graduate, and a former Division I swimmer and track & field athlete.

Senior Fitness Specialist · Functional Aging Specialist · Parkinson's Disease Specialist · Brain Health Trainer · Corrective Exercise Specialist

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