Experiment: The top 10 things I learned drinking only water for a month

by | Mar 13, 2014 | Productivity Experiments

Takeaways: Water is one of the best things ever. My biggest lessons from this experiment (in order of increasing importance): every day you drink a whopping 400 calories; there are 8 triggers that motivate you to drink something; caffeine boosts your athletic performance; what you eat and drink are two of the biggest things that impact your energy levels; coffee/tea are just as hydrating as water; take the time to be grateful for all of the nice things you have; you should drink caffeine strategically, not habitually; and caffeine boosts your focus, but makes you less creative. Whew.

Estimated Reading Time: 11 minutes, 57s. It’s pretty skimmable, though.

For the entire month of February I drank only water as a productivity experiment. I had no caffeine-based pre-workout drink to get ready for the gym, no mid-afternoon tea, no red wine on Valentine’s Day, and no drinks on my girlfriend’s birthday–the fanciest thing I drank all month was a cup of hot water with a lemon wedge. (I’m definitely kicking myself for not picking an easier month, but hindsight is 20/20 I guess.)

To be honest I didn’t expect to learn much from this experiment, but looking back, I learned a ton. This article is a long one, but I know you’ll get a lot out of it, and I tried to make it as skimmable as possible so you can easily skip to the parts you’re interested in.

Without further ado, here are the top 10 lessons I learned drinking only water for an entire month!

10. Every day you drink a whopping 400 calories

If you’re average, every day you drink a whopping 400 calories.1

With a bit of basic arithmetic, it’s not hard to calculate how drinking more water will help you lose weight. To lose a pound of fat, you need to burn off (or have a deficit of) about 3,500 calories, though this number varies depending on how fast your metabolism is, and how much water and lean tissue you burn off as you reduce your caloric intake.2 That means that if you drink only water (or fluids that contain no calories), in 9 days you will lose one pound of fat. That’s equivalent to the amount of calories your body burns running at 5mph for 30 minutes every day for 9 days!

It’s not easy to lose weight, but drinking more water has got to be one of the easiest ways out there to cut back on how many calories you consume.

Not only will drinking more water help you cut out unhealthy, high-calorie drinks from of your diet, but water also serves as an appetite suppressant that will help you consume less calories in the first place.

9. Know the eight triggers that motivate you to drink something

I think one of the keys to changing your habits is recognizing what drives your behaviour. Taking a second to ask yourself why you’re about to drink something is the perfect trigger to make yourself drink healthier.

There is always a reason you drink what you do, and when you drink so much over the course of a day, being mindful of whether that reason is productive or unproductive for your health is definitely worth doing. Personally, I can think of eight reasons you drink (if you can think of any others, sound off in the comments and I’ll add them to the article!):

  1. Socially (e.g. if you’re at a party, or grabbing a coffee with someone)
  2. For energy (i.e. with caffeinated or sugary drinks)
  3. For enjoyment (e.g. a cold beer after a long day at work)
  4. For nourishment (e.g. drinking water to rehydrate)
  5. For health reasons (e.g. drinking protein shakes and fruit smoothies)
  6. Because you’re addicted (e.g. with caffeinated or sugary drinks)
  7. For pleasure (e.g. drinking a fancy bottle of red wine)
  8. For relaxation (e.g. drinking a cup of herbal tea in the evening)

When you are about to drink something that’s unhealthy for you, chances are there is a substitute that will reward you in the same way that is much better for your health.

Another awesome way to take control over what you drink is to look for the cues that cause you to drink certain things. Your cues will always fall into one or more of five categories: a certain time of day (e.g. morning), a certain place (e.g. Starbucks), the presence of certain people (e.g. coworkers), a particular emotion (e.g. feeling low on energy), or a preceding behaviour that’s been ritualized (e.g. waking up).


449682_441548828. Caffeine boosts your athletic performance

Caffeine has been shown to significantly improve your athletic performance, which may be why more than two-thirds of 20,000 Olympic athletes studied in one report had caffeine in their bloodstream after the World Anti-Doping Agency removed it from its list of banned substances.3

According to research, caffeine significantly improves your performance in both aerobic and weight exercises:

  • Caffeine has “been proven to increase the number of fatty acids circulating in the bloodstream, which enables people to run or pedal longer”4, which significantly improves your endurance in sports like running and cycling.
  • In one study, weightlifters performed significantly more repetitions than participants taking a placebo and “also reported feeling subjectively less tired during the entire bout and, in perhaps the most interesting finding, said that they were eager to repeat the whole workout again soon”5

Though researchers haven’t come to a conclusion on how much caffeine you should consume before working out, I typically consume 100-150mg of caffeine (in a pre-workout drink) about 15 minutes before I hit the gym. I definitely noticed that I had a lot less energy at the gym during this experiment.

7. What you drink profoundly affects your energy

What you drink has a huge impact on how much energy you have. Caffeine spikes your energy levels, making you crash a few hours later. Sugary drinks do the same thing, but by spiking your blood sugar levels instead of by inhibiting adenosine reuptake. Alcohol depresses your mood, and while it helps you become more creative, I’d vehemently argue that those effects are more than offset by how much focus you’ll lose, and how easily you’ll be distracted.

During this experiment I was pretty surprised by how stable my energy levels were after I removed sugar, caffeine, and alcohol from my diet. So much of becoming more productive is obvious in hindsight, and this lesson is definitely no exception to that rule.

What you drink profoundly affects how much energy you have. Especially when energy serves as the fuel that you burn to be productive throughout the day, it’s worth reducing your dependance on sugary, caffeinated, and alcoholic drinks to regain control over how much energy you have throughout the day.

6. Food has a huge impact on your energy levels as well

Just like with what you drink, what you eat has a huge impact on your energy levels. During this experiment, once I removed all of the caffeinated, sugary, and alcoholic drinks from my diet, I realized just how much food affected my energy levels after I could isolate its effects.

Interestingly, during the experiment I identified a few eating tactics that gave me significantly more energy to get stuff done.

  1. Eat smaller portions, more frequently. I think the most effective way to get more energy from food is to eat smaller portions, more frequently. Think of your energy reserves as a fire that burns throughout the day. It’s much easier to keep a fire going when you frequently throw in a bunch of small pieces of wood compared to when you throw in in five big logs at a time.
  2. Stay away from processed, sugary foods that will spike your blood sugar levels and then make you crash afterward.
  3. Slow the hell down. It takes your brain about 20 minutes to know when your body is full, so slow the hell down!6 Eating too much at once will spike your energy levels and then cause them to crash, destroying your focus and productivity later in the day.
  4. Constantly ask yourself whether you’re hungry. During the experiment, I found that constantly asking myself whether I was hungry short-circuited any urges to mindlessly overeat.

If you’re serious about wringing every last ounce of productivity out of your daily regimen, I think you should adopt these tactics, too.

Interlude: My 10 favorite productivity experiments from my year of productivity

10 of my favorite experiments from my year of productivity, in no particular order. Just click on any picture to visit the experiment’s article.

5. Coffee and tea are just as hydrating as water

When I was doing research for this article, this fact surprised me the most.

Caffeine-based drinks like coffee and tea used to be considered dehydrating, but that myth has been since debunked; it turns out the “diuretic effect [that’s caused by caffeine] does not offset hydration”.7 Alcohol still dehydrates you, and experts recommend “at least a one-to-one ratio with water”, but you’re pretty much in the clear with caffeine-based drinks, especially if you drink them on a regular basis.8

4. Take time to be grateful for everything you have


There are certain elements in your life, like electricity and the Internet, that are so interwoven into your routines and habits that you might forget they exist, until they’re gone.

Drinking only water for a month was doable, but I definitely missed all of the other drinks that I frequently took for granted before the experiment began. It wasn’t until I forced myself to remove them from my life that I regretted not being grateful for them when I consumed them every day.

Every night before I head to bed I recall three things I’m grateful for. That might seem a bit hippy-dippy on the surface, but forming a daily ritual of recalling three things you’re grateful for actually trains your brain to become happier, because you “retain a pattern of scanning the world not for the negative, but for the positive first”.9 Over the last few months I’ve found that the habit works wonders in making me more grateful for all of the nice things I have in my life, coffee and tea included.

3. Water is up there with sex as one of the best things ever

There are literally hundreds of benefits to drinking more water. In fact, I’ve frequently thought about putting together a huge-ass article listing all of the health benefits of water, and I still might.

Here are just a few of my favorite benefits, among hundreds, of drinking more water:10

  • Water fires up your metabolism. In fact, when you drink water first thing in the morning it boosts your metabolism by a whopping 24% for 90 minutes!
  • Water helps you think. Your brain is made up of 75% water, so drinking more water gives your brain more fuel to operate on.
  • You’ll eat less, since water acts as an appetite suppressant.
  • Water helps your body flush out toxins and eliminate waste products.
  • Water helps reduce the risk of many diseases and ailments, including bladder and colon cancer.
  • Water clears up your complexion. I didn’t think it was possible for me to get even more handsome until I drank water for an entire month. Within the first couple of weeks, my complexion completely cleared up and became more vibrant than ever. Water moisturizes your skin, keeping it “fresh, soft, glowing and smooth”. It also helps you get rid of wrinkles.
  • Water saves you money! I love living frugally, and last month I spent way less money going to coffee shops, bars, and other places when I only drank water. Drinking more water can save you a large amount of money–try it and see.


2. To become more productive, drink caffeine strategically, not habitually

If you require caffeine in order to be productive on a regular basis, you’re likely doing something wrong.

The reason for this is simple: your body adapts to how much caffeine you regularly consume.11 That means that if you do not drink caffeine on a regular basis, and then have a coffee, you’ll feel really energized. But if you drink a cup of coffee every morning, your body becomes used to that amount, and that becomes your new normal. To reach a comparable caffeine high, you’ll have to consume two cups of coffee every morning, because your body will have adapted to drinking only one.

Interestingly, I didn’t experience any caffeine withdrawal symptoms during this experiment, I think for a simple reason: for the most part, I consume caffeine strategically, not habitually. I know I am not the norm here–when 80-90% of North Americans consume caffeine on a daily basis, I’d imagine most people consume that caffeine as a part of their daily routine.12 But if you want to use caffeine to become more productive, it’s worth consuming it strategically; consuming caffeine before you require more focus and energy to get important things done.

For example, I usually drink a tea or a coffee:

  • Before hitting the gym
  • Right before an important media interview, or before I give a speech
  • When I want to focus on writing (like I am right now)

Drinking caffeine strategically instead of habitually will help you reduce your dependance on the addictive substance, and it will allow you to be much more productive.


1. Caffeine boosts your focus, but compromises your creativity

970305_52657032-1It is difficult to summarize all of the research out there on caffeine and productivity in a few paragraphs, but the relationship is an interesting one.

At the end of the day, caffeine impacts your productivity in two big ways: it boosts your focus, and compromises your creativity.

  • Caffeine boosts your focus. Caffeine helps you focus on just a few things (instead of being distracted by every new thing that comes up); great for when you have to hunker down and focus on a single task.13
  • Caffeine compromises your creativity. To be maximally creative, you need to give your mind time to wander. Since caffeine pushes you to direct your focus toward a few activities or tasks, it has less time to wander and think about alternative approaches to problems, and step back from your work so you can see it from an elevated perspective.14

I think two of the largest contributors to your productivity are how well you can focus, and how creative you are, because they help you work more efficiently and effectively.15

  • Being able to focus helps you work more efficiently. Being able to manage your focus allows you to become more efficient at what you do, because being able to manage your attention better helps you give more of yourself to your work. As a simple example, if it takes you 4 hours to write a report when you focus 50% of your attention on it, it might take you one hour to write that same report when you devote 95% of your attention to it.
  • Being creative helps you work more effectively. I think the more creative you are, the smarter you work, because you’re able to identify the best things to work on at any given time. That helps you accomplish more in less time. When you give your mind more space to wander, it tends to come up with some pretty intelligent solutions to problems.

The relationship between caffeine and productivity is definitely a muddled one, but I think the best advice I can give you is this: if you need to be creative in your work, try to reduce your dependance on caffeine so you give your mind a chance to wander. But if increasing your focus will help you become more productive than increasing your creativity, continue drinking caffeine.

And at the same time, don’t forget how wonderful water can be for you.

  1. Source: https://www.sparkpeople.com/resource/nutrition_articles.asp?id=1556 

  2. To be honest, I went back and forth on whether to include this figure in the article. The number is a huge oversimplification; while there are about 3,500 calories in a pound of fat, your body loses lean tissue and water along with fat, and your basic metabolic rate will vary depending on your genetics. But I included the figure–albeit, with a big disclaimer–because I think it serves as a good example to illustrate how beneficial drinking more water can be for you. 

  3. Source: http://www.ncbi.nlm.nih.gov/pubmed/21854160 

  4. Source: http://well.blogs.nytimes.com/2011/12/14/how-coffee-can-galvanize-your-workout/ 

  5. Source: http://well.blogs.nytimes.com/2011/12/14/how-coffee-can-galvanize-your-workout 

  6. Source: http://healthyeating.sfgate.com/stomach-full-stop-eating-3080.html 

  7. Source: http://www.webmd.com/parenting/features/healthy-beverages 

  8. Source: http://www.webmd.com/parenting/features/healthy-beverages 

  9. Source: http://www.ted.com/talks/shawn_achor_the_happy_secret_to_better_work 

  10. Sources: https://chrisbailey.com/killer-morning-habit-drink-water-right-after-you-wake-up/; http://www.mindbodygreen.com/0-4287/10-Reasons-Why-You-Should-Drink-More-Water.html; https://www.caring4cancer.com/go/cancer/Article.aspx?ContentId=316201 

  11. Source: http://www.bbc.co.uk/news/10202553 

  12. Source: http://www.livestrong.com/article/540327-how-does-the-body-adjust-to-caffeine-withdrawal/ 

  13. Source: http://www.today.com/health/7-things-you-didnt-know-about-caffeine-1B6013380 

  14. Source: http://www.newyorker.com/online/blogs/elements/2013/06/how-caffeine-short-circuits-creativity.html 

  15. I’m personally not a big fan of the terms “efficient” and “effective”, because I think they’re overused and have lost a lot of their meaning. But I think both terms are important in productivity. I define efficiently as doing things right, and effectiveness as identifying and doing the right things

Written by Chris Bailey

Chris Bailey has written hundreds of articles on the subject of productivity and is the author of three books: How to Calm Your Mind, Hyperfocus, and The Productivity Project. His books have been published in more than 40 languages. Chris writes about productivity on this site and speaks to organizations around the globe on how they can become more productive without hating the process.

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