Between air conditioning, back-to-back meetings, and screens all day, most people who work seated simply forget to drink. The result: an afternoon slump, a headache at the end of the day, and declining concentration without understanding why. Here are 8 simple habits to stay well hydrated at the office, even on the busiest days.
Why we forget to drink when we have a sedentary office job
Air conditioning tricks the body's signals
Unlike being outside in the sun, an air-conditioned office does not create the sensation of heat that naturally makes you want to drink. Without visible sweating, the brain receives fewer thirst signals, even though the dry air in air-conditioned offices still accelerates water loss through the skin and breathing.
What mild dehydration does to your concentration
A loss of fluid representing just 1 to 2% of body weight is enough to reduce alertness, slow reaction time, and increase the feeling of mental fatigue. During a workday in front of a screen, it is often the first invisible cause of the 3 p.m. slump, even before lack of sleep or too much sugar at lunch.
8 habits for staying well hydrated during your workday
1. A large glass of water as soon as you arrive
After a night's sleep, the body is already slightly dehydrated. Drinking a large glass of water even before your morning coffee helps you start the day on the right foot.
2. Keep a bottle visible on your desk
What you do not see, you forget. Keeping a bottle or graduated water bottle clearly visible on your desk acts as a constant visual reminder, much more effectively than a reminder app that you eventually ignore.
3. Associate every meeting with a sip of water
Creating an automatic association between a recurring action during the day, such as going to a meeting or hanging up a call, and drinking helps build a real habit without actively thinking about it.
4. Get up to get a drink, not just coffee
Getting up every hour to refill your bottle also breaks up prolonged sitting, a health factor in its own right when you remain seated for eight hours a day. Two beneficial habits in a single action.
5. Spot the subtle signs of dehydration
A mild headache, difficulty concentrating on a task, urine that is darker than usual: these are often signs of mild dehydration rather than general fatigue. Spotting them early helps you correct the situation before the real slump hits.
6. Limit coffee late in the morning
Coffee has a mild diuretic effect when consumed in excess. Alternating it with water or a natural energy drink helps maintain the desired stimulating effect without increasing water loss throughout the day.
7. Choose a drink that combines energy and enjoyment
To maintain concentration through a busy afternoon, a drink such as Buddy cans combines enjoyable hydration with natural caffeine from guarana, which contributes to concentration and alertness, along with Ginkgo Biloba, without the typical energy spike and crash of highly sugary drinks.
8. Adjust your electrolyte intake on very hot days
Even in the office, heatwave days or poorly ventilated offices increase sodium and magnesium losses through the skin. Taking electrolytes in addition to water helps limit headaches and fatigue linked to indoor heat.
Mild dehydration is a classic cause of the afternoon slump, but it is not the only one. We have listed the others in our article on the post-lunch slump.
How much water should you really drink during a workday
General guidelines are around 1.5 to 2 liters per day for a sedentary adult, taking into account the water contained in meals. In practice, aiming for about one glass of water every hour of actual work is more than enough to cover this need without thinking about it constantly. On very hot days, days with many meetings, or days involving outdoor travel, this guideline naturally increases, and it is better to listen to your body's signals than to stick to a rigid number.
A good way to check whether your intake is sufficient is still the color of your urine: a light color indicates proper hydration, while a dark color signals that it is time to drink more. This simple guideline avoids counting every glass and naturally adapts to your activity, the weather, and office air conditioning, which increases water loss without you necessarily realizing it.
As for drinks, we compared the options that really keep you going throughout the day in our articles on drinks for staying focused and energy drinks for working.
At the office, water is almost always enough. To find out when an electrolyte drink is genuinely useful, our guide explains the differences. Both BUDDY formats, sticks and bottles, are brought together in our electrolyte range.
FAQ: your questions about hydration at the office
Does coffee count toward your daily water intake?
Yes, partly. Coffee hydrates despite its mild diuretic effect, but it should not replace water. Ideally, alternate between coffee, water, and possibly an electrolyte drink on the longest days.
Why do I get a headache at the end of the day at the office?
End-of-day headaches are often linked to mild dehydration accumulated since the morning, especially in air-conditioned offices where the sensation of thirst is reduced. Gradually increasing your water intake over a week often leads to a clear improvement.
Does a water reminder app really work?
It can help at first, but most people eventually ignore the notifications after a few weeks. Associating hydration with actions that are already automatic during the day, such as meetings or breaks, generally works better in the long term.
Should you drink more when working from home or at the office?
Your needs are similar, but working from home often makes it easier to access water throughout the day. At the office, being farther from the water cooler and having back-to-back meetings make forgetting more common, which is why it helps to keep a bottle within easy reach.
Does sparkling water hydrate as well as still water?
Yes, sparkling water hydrates just as well as still water. It is even a good option for adding variety and making you more inclined to drink regularly throughout the day.
Can insufficient hydration really cause fatigue at work?
Yes, it is actually one of the most underestimated causes of daytime fatigue. The brain is made up largely of water and reacts very quickly to even a slight decrease in intake, well before the sensation of thirst clearly appears.
