I ate 10,000 calories in a single day. Here’s how my body responded

Many of us have tried at least one form of a diet in our lifetime. I have tried at least four or five of them. As popular as dieting can be, it is important to make sure you choose the correct one for your body. This selection can often be a challenge.

We have an abundant amount of options presented to us daily for an innumerable amount of dieting options. We see everything from extremely low carb to high protein and beyond.

But have you heard of eating 10,000 calories a day?

If your mouth just fell open in surprise, then you are not alone. The first I had ever heard of eating this many calories was while reading an article about the Game of Thrones actor Hafþór Júlíus Björnsson, also known as ‘The Mountain.’

His protein-packed meal plan goes far beyond the standard 2,000 calories a day consumption for a human being. Reading through his list of every two-hour meals made me both insanely curious about the meal plan and deeply concerned about the cost of his grocery bill.

After careful consideration, I decided to give it a try!

What does a 10,000 calorie diet consist of?

Those that are into bodybuilding know that it is important to feed your muscles. We are talking about lean proteins, balanced carbs, and specific vegetables.

I spend a good 5-6 days in the gym every week, so I found this diet somewhat intriguing, to say the least. 

My biggest question was, what did I need to consume to hit those 10,000 calories?

Thankfully, Björnsson posted his exact diet on his Instagram, so I decided to follow through with his routine. His meal plan consists of the following:

  • Meal one: BCCAs, glutamine, and a handful of almonds
  • Meal two: Eight eggs, 200 grams of oats, blueberries, strawberries, avocado
  • Meal three: 400 grams of beef, 400 grams of sweet potato, a handful of spinach and greens
  • Meal four: 400 grams of chicken, 400 grams of potatoes, a handful of greens, and some fruit
  • Meal five: A smoothie consisting of 150 grams of oats or sweet potato, two bananas, 150 grams of Kellogg’s Rice Krispies, frozen berries, handful almonds, and peanut butter
  • Meal six: 60 grams of protein plus two bananas
  • Meal seven: 500 grams of beef, more potatoes, and a handful of greens
  • Meal eight: 500 grams of salmon plus 500 grams of sweet potatoes
  • Meal nine: Six eggs, avocado, 30 grams of almonds, and 50 grams of peanut butter
  • Meal ten: 50 grams of casein protein or a couple of raw eggs

This was going to be a challenge, but I decided to try for a week. Here is what happened.

A week full of food

While I was nowhere near The Mountain’s fitness level, I made sure to increase my training to make it easier to consume the extra calories. By raising my weight amount, along with my reps, I concluded that this might help. I was not completely incorrect; it definitely did not help enough!

Eating every few hours became a serious challenge by the late afternoon. I had a strong desire to give up so that I could avoid eating any more food. I even found myself eating in the middle of the night, much like Björnsson, to try and fit all the calories in.

By the third day, my body was somewhat adjusting to this new routine of eating, working out, eating, working, eating, eating, sleeping, and eating more. I found it was a bit easier to get the food in. However, my body did not appear to be as convinced that it was necessary.

As the end of the week approached, I found that my workouts felt a bit easier. All the excess food in my system was fueling my body for my workouts. I was able to lift heavier weights and do more repetitions without feeling fatigued.

The results

While these appeared to be positive effects, it was quite clear that 10,000 calories were far too many for the level of workouts that I was enduring. Even with the increase in my workouts, it was simply too much food.

The amount of physical activity needed to maintain a diet of 10,000 calories is far beyond what I was able to complete in a week. If I spend several months building up to this diet, it may have been a more feasible meal plan for my body.

I also feel that I would have to enlist a trainer and nutritionist’s skills to properly onboard with such an intense meal plan. My weight training and cardio would have to increase beyond its current state.

The bottom line

Attempting to consume 10,000 calories a day was quite the challenge, but it did cause me to have a new appreciation for the level of dedication that is put into following such a lifestyle.

I have a newfound respect for Björnsson and others who may follow a similar meal plan. I did my best to endure it, but this is a whole new level of commitment to the art of fitness and bodybuilding.

I may decide to follow a healthier meal plan, but I believe I will leave this 10,000-calorie diet to the experts!