Can you build muscle if you don't eat right?

Author: Mr. Kevin Kihn  |  Last update: Friday, April 11, 2025

You need to be eating enough for your body to build and maintain muscle, a sports dietitian said. Symptoms like constant fatigue, sleep loss, soreness, and hunger may mean you've cut calories too low. To prevent muscle loss, make sure you get enough food, including carbs, to fuel your workouts.

Can I build muscle if I don't eat enough?

If you don't eat enough, it will be difficult to gain muscle mass. Your body needs a sufficient amount of protein and calories to build and repair muscle tissue. Without an adequate intake of nutrients, your body won't have the necessary resources to support muscle growth.

Can you still build muscle if you eat unhealthy?

However, Derocha said that getting nutrients from poor quality foods will make it harder to build muscle mass and fully recover from a strenuous workout. To build muscle mass, your best bet is to include foods high in protein such as chicken and salmon in your diet.

Can you gain muscle while undereating?

No, it is not possible to gain lean muscle while eating fewer calories than your body needs to maintain its current size/weight. In order to build muscle, you need to create a slight caloric surplus and provide your body with enough protein to support the muscle growth.

Can you gain muscle while eating little?

No, it is not possible to gain lean muscle while eating fewer calories than your body needs to maintain its current size/weight. In order to build muscle, you need to create a slight caloric surplus and provide your body with enough protein to support the muscle growth.

The Effects of Under-eating & Muscle Growth

What happens if you workout but don't eat enough?

Overtraining and undereating can not only cause you to lose efficiency, but it can also cause you to lose muscle mass. If you have weight loss goals, eating less may sound like a good idea, but if it doesn't align with your fitness goals, you won't see the results you're hoping for.

Is 2400 calories enough to build muscle?

The general rule is that consuming an excess of at least 2,500 calories per week can help increase lean tissue by one pound of gained mass. This number is derived from several published studies, but it is generalized for the 'average exerciser. ' For muscle hypertrophy, your client may need even more excess calories.

Can you build muscle while starving?

If fasting means you're not getting enough calories, your workout performance and recovery can slip, leading to fewer muscle gains.

Can I build muscle in a 500 calorie deficit?

“Some studies have argued that muscle gains are manageable on an energy deficit up to 500 calories per day,” says Dr Adam. “In theory, this type of deficit would cover traditional calorie-restricted diets, as well as intermittent fasting, which often averages out at 500 calories per day across the week.”

How do I know if I've gained muscle?

5 Secret Signs You're Building Muscles
  • Increased Strength. Even without documented muscle growth, you're making gains if you're getting stronger. ...
  • The Scale is Going Up. ...
  • Your Workouts Feel Easier. ...
  • Your Posture Is Better. ...
  • You're Recovering Faster from Your Workouts. ...
  • Summing It Up.

What happens if you exercise a lot but eat unhealthy?

In one of the largest studies to look at the effects of physical activity and diet quality, researchers found those who regularly exercised but ate anything they wanted were at greater risk of mortality compared with people who both exercised and made healthy dietary choices.

What is dirty bulking?

There are other terms for this, such as build mode, but bulking is a common term for this caloric surplus. Dirty bulking is when an individual is in a caloric surplus to build muscle (build mode). However, the individual is eating foods that are carb dense, unhealthy, and ultra-processed out of convenience.

Will I lose muscle if I barely eat?

Even if you want to lose body fat, which does require a calorie deficit, cutting calories too much can cause you to lose muscle rather than maintaining muscle while burning fat. Watch out for clear signs that your body isn't getting enough nutrients as a cue to eat more for better gains, Asche said.

What happens if I lift weights but don't eat enough protein?

Without enough protein, your muscles may struggle to recover properly, leading to slower progress in strength and weight gain. Intense physical activity, such as weightlifting, can temporarily weaken the immune system, making it important to consume enough protein to support immune function and overall recovery.

Can you get ripped on a calorie deficit?

Yes, it is possible to gain muscle while in a calorie deficit, but it depends on several factors such as caloric intake, protein intake, recovery, and weight lifting.

Should you build muscle or lose fat first?

If you're starting out with an already high body fat percentage, you'll want to shed the excess body fat before you bulk. This is because some fat gain is inevitable during a bulking phase, and an excessively high body fat percentage comes with a host of health risks.

Can you gain muscle without eating a lot?

Build muscle without bulking — this was thought impossible because your body needs a lot of energy for muscle growth. However, research clearly shows that you can build muscle without bulking as long as you're in a small to moderate calorie deficit (< 500 calories).

What happens if you train muscles but don't eat enough?

"If you don't eat enough, your body may start breaking down muscle to use for fuel," Rumsey says. Plus, when you're not properly fueled, you may be too tired to push through as many reps.

Is fasting bad for muscle growth?

While they did lose some body fat, participants' testosterone levels also dropped and cortisol (the stress hormone) levels were elevated. So, if building muscle is your goal, fasting probably isn't the best way to do it.

Can you build muscle if you undereat?

So, while building muscle on a calorie deficit may be more difficult, it's still possible to increase your strength. This is a crucial distinction for individuals looking to lose fat and gain muscle at the same time.

Can you eat whatever and still gain muscle?

To make gains you have to have the right nutrients in your body to construct muscle. This means that what you eat, and how much, is essential in making muscle gains. Lifting and doing strength training without adequate nutrition, especially without enough protein, can actually lead to loss of muscle tissue.

How many calories should a 170 pound man eat to gain muscle?

Most people require around 20 calories per pound (or 44 kcal / kg) of bodyweight to gain muscle mass.

How much muscle can you gain in a month?

Most people can gain about half a pound of muscle in a month, while others new to training may gain two pounds.

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