A 3-pound increase in two days is almost never body fat. It's most likely water, glycogen, inflammation, and normal digestion. If you're eating in a calorie deficit and training hard, the scale doesn't always reflect the fat you're losing. Stay consistent and look at the trend over time, not one day's number.
One of the biggest mistakes I see people make is assuming every jump on the scale means they've gained fat.
You have a couple of higher-carb days, the scale goes up, and suddenly you think you've undone weeks of progress.
That's not how the body works.
Why It Can't Be Fat Gain
To gain 3 pounds of body fat, you would need to eat roughly 10,500 calories above your maintenance calories.
If you're eating around 1,250 calories per day while training consistently and staying active, that simply isn't happening.
The scale may have gone up, but it isn't because you gained 3 pounds of fat.
So What's Happening?
There are several completely normal reasons your weight can increase overnight.
Your Body Is Storing More Glycogen
When you increase your carbohydrate intake, your muscles begin storing more glycogen, which is your body's stored form of carbohydrate.
Every gram of glycogen is stored with approximately 3 to 4 grams of water.
Even if you only increased your carbs to around 80 grams per day, that's enough to see a noticeable increase on the scale.
That's water - not fat.
Your Muscles Are Recovering
If you're lifting weights, using the SkiErg, rowing, biking, or getting in a lot of daily steps, you're creating microscopic muscle damage every workout.
That's exactly what stimulates muscle growth and strength.
As your body repairs those muscles, it temporarily holds more water in the tissues.
That inflammation is part of the recovery process, not a sign that your program isn't working.
You're Probably Under-Fueling
Let's look at the numbers.
If you're burning roughly 2,700 to 2,800 calories per day and only eating around 1,250 calories, you're creating an enormous calorie deficit.
While that sounds great for fat loss, it also places stress on the body.
When calories stay very low while activity stays very high, your body often responds by holding onto water.
That temporary water retention can completely hide the fat you're actually losing.
More Food Means More Weight
This one is simple.
If you're eating a little more food or more fiber than you were before, there's simply more food moving through your digestive system.
That alone can increase your body weight from one day to the next.
Again, it isn't body fat.
The Pattern I See All the Time
Here's what usually happens...
People eat very little.
They train hard.
They finally increase their carbohydrates.
The scale jumps.
They panic.
Then they cut calories even lower or remove the carbs again.
Unfortunately, that's exactly what keeps people stuck.
The problem isn't the carbohydrates.
The problem is reacting to a temporary change that was completely expected.
What Should You Do?
Don't cut your calories even lower.
Keep your carbohydrate intake consistent instead of constantly increasing and decreasing it.
Give your body five to seven days to stabilize before deciding whether anything needs to change.
Most importantly, stop judging your progress based on one morning weigh-in.
Daily weight fluctuates.
The weekly trend tells the real story.
My Take
If you're eating in a calorie deficit and staying consistent with your workouts, a sudden increase on the scale doesn't mean you've gained fat.
More often than not, it's your body restoring glycogen, recovering from training, and holding a little extra water while it adapts.
I've seen this happen countless times.
Stay consistent.
Trust the process.
The scale will usually catch up once your body has had time to stabilize.