Water is involved in almost every function of the body, including regulating temperature, moving nutrients and cushioning joints. When we exercise, we lose water through sweat, and even mild dehydration can make a workout feel harder. Good hydration habits are simple, but they are often overlooked.
Why Hydration Matters in Training
- Helps regulate body temperature during exercise
- Supports blood flow and heart function
- Reduces the chance of fatigue, headache and cramps linked to dehydration
- Helps concentration and coordination, which matter in sport
Signs You May Be Dehydrated
- Dark yellow urine
- Thirst and dry mouth
- Unusual tiredness or dizziness
- Headache
- Reduced performance in training
Thirst is a useful signal, but during intense exercise it can lag behind. Planning your fluids helps.
Before Exercise
Start training well hydrated. Drink fluids regularly through the day and have a glass or two of water in the couple of hours before a session. Check your urine colour: a pale straw colour is a good sign.
During Exercise
For sessions under about an hour, water is usually enough. Sip regularly rather than drinking large amounts at once. For long, intense or very hot sessions, sweat also contains salts, so an oral rehydration drink or a salted drink may be useful. Needs differ from person to person.
After Exercise
Replace what you lost. Drink fluids steadily over the next few hours and eat a balanced meal with some salt content, which helps the body retain fluid. A simple check is to compare body weight before and after long sessions to understand your own sweat loss.
Practical Habits
- Carry a water bottle and keep it where you can see it
- Drink a glass of water with each meal
- Eat water-rich foods such as fruit, curd and vegetables
- Be extra careful in hot and humid weather
- Avoid relying on sugary drinks for regular hydration
When to Be Careful
Drinking too much water in a short time can also be harmful. People with heart, kidney or other medical conditions should follow their doctor's advice on fluids.
Key Takeaways
- Start training well hydrated and sip regularly.
- Pale straw-coloured urine is a simple hydration check.
- Do not overdrink, and follow medical advice if you have a condition.
Frequently Asked Questions
Is plain water enough for most workouts?
For sessions under an hour, usually yes. Long, intense or very hot sessions may need electrolytes.
How do I know how much to drink?
Observe thirst, urine colour and weight changes after long sessions. Needs differ between individuals and conditions.
Can I drink too much water?
Yes. Excessive intake in a short time can be harmful, so drink steadily rather than in large amounts.
Next Step
Learn more about performance nutrition and how to advise active people responsibly. Visit refitcertified.com and explore the Certified Sports Nutritionist course and our fitness e-books.
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