Weight and muscle gain (2024)

Weight management

  • Gaining lean body weight is a slow process that takes months and years rather than days and weeks.
  • See your doctor before starting any weight-gain program.
  • To gain weight, you must eat more and stimulate muscle growth.
  • Don’t waste your time or money on powders, pills and products that claim to increase muscle mass.

On this page

  • Reasons for lack of weight gain
  • Consult with your doctor before trying to gain weight
  • Eat more for weight gain – quality first, quantity second
  • Resistance training for muscle gain
  • Lifestyle adjustments for weight gain
  • Track your weight gain progress
  • Where to get help
  • Things to remember

A person’s build depends largely on genetic factors, which is why it is difficult for a naturally thin person to put on weight. The human body can change to a limited extent through weight training and increased food intake. Gaining or regaining weight can be just as difficult as losing weight. When done in a smart, healthful way, many of the same basic principles apply to both gaining and losing weight.

It is important to consult with your doctor to make sure that your weight-gaining tactics are healthy and appropriate for you.

Reasons for lack of weight gain

Some common reasons why a person may find it hard to gain weight include:

  • genetics
  • not eating enough
  • having a very physically active lifestyle or job
  • overexercising

Please note that some people are too thin because of a disability, eating disorder, substance abuse, or serious medical condition – these conditions are not addressed in this fact sheet.

Consult with your doctor before trying to gain weight

Always see your doctor before you start any weight-gain program. Your doctor can:

  • give you a check-up to rule out the possibility of an underlying medical condition that may be causing your thinness, such as hyperthyroidism
  • suggest an appropriate weight goal for your height and build
  • assess your diet and physical activity levels
  • advise on diet, exercise and lifestyle changes that will encourage weight gain
  • refer you to other specialists, such as a dietitian, if necessary.

Eat more for weight gain – quality first, quantity second

Being underweight usually occurs when energy (kilojoule) intake is less than the energy used. In other words, you need to eat more in order to gain weight.

The secret to healthy weight gain is to make all your kilojoules as nutrient-rich as possible. Consuming more empty-calorie foods like soft drinks and chips is not a successful way to build muscle, strengthen bones or repair tissue after surgery.

Suggestions include:

  • Use a kilojoule-counter book to calculate how many kilojoules you eat on an average day. The amount may be smaller than you think.
  • Eat three good meals every day. Give yourself slightly larger serves if you can.
  • If you have a small appetite, eat five to six times a day. Drink fluids before and after meals, but not with them. This helps leave more room for food.
  • Successful weight gain requires that you increase your daily intake of carbohydrates. Avoid low carbohydrate diets.
  • Eating vast amounts of dietary protein won’t make your muscles grow faster and will put unnecessary pressure on your body, especially your kidneys. Avoid high-protein diets.
  • A healthy snack may include fruit, yoghurt, muffin, rice pudding, low-fat custard, milkshake or liquid meal supplement.
  • Avoid high-fat junk foods. Instead, choose nutritious high-fat foods such as avocado or nuts.
  • Top your usual foods with some concentrated calories, like grated cheese. Spread peanut or almond butter on a wholegrain muffin.
  • Prepare hot oatmeal or other cereal with milk, not water. Add powdered milk, honey, dried fruits or nuts after cooking.
  • Garnish salads with healthy oils such as olive oil, whole olives, avocados, nuts and sunflower seeds.
  • Pump up soups, casseroles, mashed potatoes and liquid milk with one to two tablespoons of dry milk powder.

Resistance training for muscle gain

Resistance training promotes muscle growth. Examples of resistance training include the use of free weights, weight machines, your own body weight or resistance bands. Suggestions include:

  • Train just two or three times per week to give your muscles time to recover. If you’re tempted to train more often, remember that muscle growth occurs during recovery.
  • Choose compound exercises that work multiple major muscle groups, for example, the squat and bench press.
  • Make your workouts short and intense rather than long and leisurely.
  • Don’t waste your time or money on powders, pills and products that claim to increase muscle mass. These claims are not scientifically proven.
  • Seek professional advice. A gym instructor, personal trainer, exercise physiologist or physiotherapist will help make sure you are doing each exercise correctly. Good advice will increase your gains and reduce your risk of injury.

Lifestyle adjustments for weight gain

Suggestions include:

  • Be prepared to eat when you are not hungry.
  • Use a timer to remind yourself to eat every two hours.
  • Try to make your additional eating sessions as appealing as possible. For example, stock the fridge and cupboard with snack foods you love.
  • Eat small serves of protein foods before and after each resistance training session to help promote muscle growth.
  • Accept that an increase in food intake may cause bloating or gas.
  • Be prepared to gain some fat as well. It isn’t possible to increase muscle mass without also increasing body fat.

Track your weight gain progress


Tracking your progress helps to boost motivation. Suggestions include:

  • Keep a diary to monitor your kilojoule intake and training schedule.
  • Be consistent. Weight gain requires that you increase your daily food intake every day. It may help to write up meal plans.
  • Make sure your goals are realistic. For example, an increase of a few kilos may take a year to achieve. Putting on lean body weight takes time, so don’t be disappointed with small gains.
  • See your doctor regularly to assess your progress.

Where to get help

  • Your doctor
  • Dietitians Association of Australia Tel. 1800 812 942
  • ESSA Exercise & Sports Science Australia Tel. (07) 3862 4122
  • Physiotherapist
  • Qualified gym instructor
  • Qualified personal trainer

Things to remember

  • Gaining lean body weight is a slow process that takes months and years rather than days and weeks.
  • See your doctor before starting any weight-gain program.
  • To gain weight, you must eat more and stimulate muscle growth.
  • Don’t waste your time or money on powders, pills and products that claim to increase muscle mass.

This page has been produced in consultation with and approved by:

Weight and muscle gain (2)

This page has been produced in consultation with and approved by:

Weight and muscle gain (4)

View all weight management

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Content disclaimer

Content on this website is provided for information purposes only. Information about a therapy, service, product or treatment does not in any way endorse or support such therapy, service, product or treatment and is not intended to replace advice from your doctor or other registered health professional. The information and materials contained on this website are not intended to constitute a comprehensive guide concerning all aspects of the therapy, product or treatment described on the website. All users are urged to always seek advice from a registered health care professional for diagnosis and answers to their medical questions and to ascertain whether the particular therapy, service, product or treatment described on the website is suitable in their circ*mstances. The State of Victoria and the Department of Healthshall not bear any liability for reliance by any user on the materials contained on this website.

Reviewed on: 30-06-2015

Weight and muscle gain (2024)

FAQs

Is it possible to gain weight and Build muscle? ›

Gaining lean body weight is a slow process that takes months and years rather than days and weeks. See your doctor before starting any weight-gain program. To gain weight, you must eat more and stimulate muscle growth. Don't waste your time or money on powders, pills and products that claim to increase muscle mass.

How does gaining muscle affect weight? ›

How Do Muscle and Fat Affect Weight? While 5 pounds of muscle and 5 pounds of fat weigh the same, they can look quite different and have different health effects. Muscle is not factored into your BMI, but it is factored into your body fat percentage.

How much weight do you gain with muscle? ›

Factors Affecting Muscle Growth

Remember that you will likely gain more muscle during the initial one to three months of training, but gain less after. Overall, around 8 to 15 pounds per year is a general estimate of what to expect from gains, but some people may add more or less.

How can I gain weight and muscle fast? ›

To gain weight and muscle mass, you should consume more calories than you burn. You should eat every 3 hours and avoid skipping meals, and add high-calorie foods nutrient-dense foods to your meals, like olive oil, fruit smoothies, oatmeal, avocado and nuts.

Why have I gained 10 pounds since working out? ›

Muscle weighs more than body fat

If you've only ever done cardio exercise, you may be confused when a strength-training program leads to weight gain. But the reason for it is simple: Weight training builds lean muscle mass, which is denser than body fat.

How do I tell if I'm gaining fat or muscle? ›

In general, weight gain from fat will result in a softer appearance, while weight gain from muscle will leave you looking leaner and feeling stronger. The most accurate way to assess any change in your body composition is through body composition testing.

Does lifting weights burn belly fat? ›

Weight training not only works to reduce belly fat but also brings a lot of health benefits, preventing many diseases. Therefore, you can choose exercises and movements that are suitable for your health, and combine with a healthy diet to bring about the highest efficiency in reducing belly fat.

Is a 30 minute workout enough to build muscle? ›

Weight training for 20 to 30 minutes, 2 to 3 times a week is enough to see results. You should try to target all your major muscle groups at least twice throughout your weekly workouts. While you may not see results right away, even a single strength training session can help promote muscle growth.

Is it okay to lift weights every day? ›

It's not necessary to lift weights every day, and if you do, you increase your risk for overuse injuries and overtraining syndrome. For most people, strength training two to three times a week is sufficient, but if you prefer to split training different muscle groups, then you can train up to five days a week.

Why do I look thinner but weigh more? ›

Know the Truth About Weight

It's possible to gain muscle and reduce body fat without actually seeing a change in your weight. This happens when you lose body fat while gaining muscle. Your weight may stay the same, even as you lose inches, a sign that you're moving in the right direction.

Is it better to lose fat or build muscle first? ›

Many people have found it most effective to focus on losing body fat first and then working toward toning and gaining muscles.

What to eat for muscle gain? ›

The best muscle-building foods are high in protein, contain complex carbohydrates, and provide healthy fats. Examples include lean meats and fish, nuts and seeds, beans, and whole grains.

How can a skinny person gain weight and muscle fast? ›

In general, your plan may include:
  1. Eating more frequently. Slowly begin to eat 5 to 6 smaller meals during the day. ...
  2. Choosing food with lots of nutrients. ...
  3. Top it off. ...
  4. Try smoothies and shakes. ...
  5. But watch what and when you drink. ...
  6. Exercise.

How fast can a skinny person gain muscle? ›

Under optimal conditions, some say you can expect to gain 1 pound (. 5 kg) of muscle per week. My results have shown that 2 lbs (1kg) per month is more realistic. A 2016 studyrevealed that strength training produced a 2.2 lb increase (1kg) increase in lean mass in 8 weeks.

What food to eat to gain weight and muscle? ›

Carbs and high-fat foods: Healthy foods that are rich in complex carbohydrates and high in fiber, such as bananas, oats, quinoa, blueberries, sweet potatoes, cheese, and dark chocolate, can help you gain weight. Energy-rich foods: Energy-dense foods fuel your body and can help you put on pounds in a healthy way.

Can I lose fat and gain muscle at the same time? ›

Simultaneously losing fat and building muscle is possible, but it can be challenging. Doing so requires a mix of strength and resistance training, cardio exercise and a solid nutrition plan. Sometimes, weight loss medications may also be appropriate. Nutrition and physical activity are key.

How to gain weight fast for skinny people? ›

Do
  1. gain weight gradually by adding healthy calories – adults could try adding around 300 to 500 extra calories a day.
  2. eat smaller meals more often, adding healthy snacks between meals.
  3. add extra calories to your meals with cheese, nuts, and seeds.
  4. have high-calorie drinks in between meals, such as milkshakes.

How to gain muscle as a skinny guy? ›

Exercise Regularly: Focus on exercises like squats, deadlifts, and bench presses. Gradually lift heavier weights to build muscle. Eat Healthy Foods: Fill your meals with protein, carbs, and good fats. Choose foods like chicken, eggs, whole grains, fruits, and vegetables.

Does increasing weight build muscle? ›

As far as your fitness is concerned, does it really matter how much weight you're lifting? Muscle growth does not depend on the amount of weight you lift. It is a myth that one must lift more weight to bulk up. If you're regular and patient with lighter weights, you can achieve similar results.

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