Hydration essentials
Staying hydrated is one of the simplest ways to support your energy, focus and overall wellbeing. Water plays a role in nearly every system in the body and even small drops in hydration can affect how you feel. Many people notice that when they are even a little dehydrated they experience fatigue, irritability or cloudy thinking.
Hydration does not have to be complicated. It is about drinking throughout the day, paying attention to your body’s signals and choosing fluids and foods that help you meet your needs with ease.
Why hydration matters
Water helps your body:
- Maintain steady circulation
- Support digestion and nutrient absorption
- Regulate temperature and prevent overheating
- Keep your brain functioning at its best
- Transport oxygen and remove waste
Because the brain and heart are made of more than 70 percent water, hydration has an immediate impact on mental clarity and energy. Even a one to two percent loss of body water can affect concentration and mood.
How much water you need
A simple baseline is:
- About 13 cups per day for men
- About 9 cups per day for women
This includes all beverages such as tea and coffee. Your individual needs may increase with exercise, hot weather, breastfeeding or long hours in heated indoor environments. Rather than aiming for a precise number, look for signs of good hydration such as steady energy, light yellow urine and minimal headaches.
Recognizing dehydration
Your body gives clear cues when it needs more fluids. Early signs include:
- Dry mouth or sticky feeling in the throat
- Headache or difficulty concentrating
- Fatigue or irritability
- Dark yellow urine
- Feeling dizzy or lightheaded
These small signals are your body’s way of reminding you to drink more often.
Hydration for activity
Movement increases your fluid needs and drinking consistently around activity helps you maintain performance and recover more easily.
A helpful guide is:
- Before exercise: drink 16 to 20 ounces of water one to two hours beforehand
- During exercise: sip 6 to 12 ounces every 10 to 15 minutes
- After exercise: drink 16 to 24 ounces for every pound of body weight lost
If you regularly do long hikes or endurance training, weighing yourself before and after workouts can help you understand your personal hydration patterns.
What to drink
Water is the most accessible option, but hydration can come from many beverages. Good choices include:
- Plain or flavored water without added sugar
- Unsweetened tea or coffee
- Coconut water
- Fat-free or low-fat milk
Sugary beverages can lead to quick spikes and drops in energy, and alcohol increases fluid loss, so it can help to keep these choices minimal on days when you already feel low on hydration.
Hydrating from food
Food contributes about 20 percent of your total daily water intake. Adding more water-rich foods is an easy way to support hydration without thinking about it. Examples include:
- Cucumbers, zucchini, celery and lettuce
- Tomatoes and cauliflower
- Watermelon and strawberries
- Yogurt and cottage cheese
These foods also provide fiber, vitamins and minerals that support overall health.
Can you drink too much water
It is possible but rare. Drinking very large amounts of water in a short period can dilute electrolytes. This may lead to nausea, headache or confusion. Slowly drinking water throughout the day is the safest and most comfortable approach.
Simple ways to stay hydrated
Small daily habits make hydration feel natural rather than forced. Try:
- Keeping a reusable water bottle within reach
- Drinking a glass of water in the morning before coffee
- Adding citrus, herbs or fruit slices to water
- Taking a few sips during transitions such as meetings or commutes
- Choosing hydrating snacks like fruit or yogurt
- Increasing fluids on hot days or during busy work periods
If reminders help, set gentle phone alerts or use a hydration app.
Resources
The Whole U’s 28 Day Hydration Challenge
Many people find that tracking their intake for a few weeks helps them stay more aware of cues from their body long after the challenge ends. Give it a try with our hydration challenge!
Infused Water Recipes
Try these tips to make delicious infused water with fruit, vegetables, herbs and spices suggested by our UW Medicine dietitians.