Building muscle while losing body fat is one of the most common fitness goals. However, achieving both at the same time can be challenging without the right approach to nutrition, exercise and recovery.
This process, known as body recomposition, involves reducing body fat while maintaining or increasing muscle mass.
In this article, we share practical tips to help you build muscle and lose fat, from strength training and balanced nutrition to hydration and recovery. Discover how to work towards your fitness goals in a healthy, sustainable way.
How to lose body fat while maintaining muscle
Losing body fat requires a combination of appropriate nutrition, regular physical activity and healthy lifestyle habits.
However, if your goal is also to build muscle, it is important to avoid overly restrictive diets or excessive exercise that could compromise muscle recovery.
Follow a balanced diet
There are countless diets and nutritional trends, but one of the most important principles is maintaining an appropriate balance of proteins, carbohydrates and healthy fats.
Contrary to popular belief, losing body fat does not mean eating only salads or eliminating entire food groups.
Instead, focus on a balanced eating plan that provides the nutrients your body needs to support physical activity and muscle development.
Healthy fats, such as those found in olive oil, avocados, nuts and oily fish, are an important part of a nutritious diet.
However, portion sizes still matter, as fats are relatively energy-dense.
It is also advisable to limit the frequent consumption of ultra-processed foods and avoid thinking of exercise as a way to compensate for unhealthy eating habits.
The most effective approach is to establish sustainable eating habits that support your training rather than relying on restrictive diets or short-term solutions.
Combine cardiovascular exercise with strength training
Physical activity plays an essential role in reducing body fat and improving overall fitness.
At Clínica Planas, metabolic assessments can help evaluate how the body uses energy at rest and during exercise, providing useful information for developing personalised training programmes.
During exercise, the body uses both carbohydrates and fats as energy sources. The proportion of each depends on several factors, including exercise intensity, duration, fitness level and nutritional status.
Lower-intensity exercise generally relies on a greater proportion of fat oxidation, while higher-intensity exercise uses more carbohydrates.
However, using a greater proportion of fat during a workout does not automatically result in greater long-term body fat loss.
For effective body recomposition, combining cardiovascular activity with resistance training is often the most appropriate approach.
Cardiovascular exercise helps improve heart health, endurance and energy expenditure, while strength training provides the stimulus needed to maintain and develop muscle mass.
Our specialists can design a personalised exercise programme based on your fitness level, physical condition and individual goals.
Best tips to build muscle mass
Increasing muscle mass requires consistent training, appropriate nutrition and sufficient recovery.
These practical recommendations can help you make the most of your workouts.
1. Prioritise strength training
Resistance training is one of the most effective ways to stimulate muscle growth.
Exercises involving weights, resistance machines or bodyweight can help increase muscle strength and support improvements in body composition.
To optimise your training:
- Warm up properly: Prepare your muscles and joints with gentle movements and lighter sets before increasing the intensity.
- Prioritise strength exercises: If muscle growth is your main objective, consider performing demanding resistance exercises before prolonged cardiovascular workouts to minimise fatigue.
- Train consistently: Strength training two to three times per week can be an effective starting point, depending on your experience and recovery needs.
- Include compound exercises: Movements such as squats, deadlifts, rows and presses engage several muscle groups simultaneously and help develop overall strength.
- Increase the challenge progressively: Gradually increasing resistance, repetitions or training volume encourages continued muscular adaptation.
Remember that your training programme should be adapted to your physical condition, particularly if you are returning to exercise after a period of inactivity.
2. Eat enough protein to support muscle growth
Protein is essential for repairing and building muscle tissue, particularly when combined with regular resistance training.
Including protein-rich foods throughout the day can help support muscle recovery and development.
Good dietary sources of protein include:
- Chicken and turkey
- Eggs
- White fish and oily fish
- Lean meat, in moderation
- Legumes, including lentils and chickpeas
- Tofu, tempeh and seitan
- Milk, yoghurt and other dairy products
For many physically active adults looking to build muscle, a daily protein intake of approximately 1.4–2.0 grams per kilogram of body weight may be appropriate, although individual requirements vary.
It is equally important not to eliminate carbohydrates from your diet.
Carbohydrates provide energy for exercise and help replenish muscle glycogen stores, supporting training performance and recovery.
A nutrition professional can help determine the appropriate balance of nutrients based on your goals, activity level and health needs.
3. Stay properly hydrated
Hydration is essential for normal physiological function, exercise performance and recovery.
Water helps regulate body temperature, transport nutrients and maintain the body’s fluid balance.
Even mild dehydration can affect physical performance, particularly during prolonged or intense exercise.
To maintain adequate hydration:
- Drink water regularly throughout the day.
- Increase your fluid intake when exercising or spending time in hot conditions.
- Replace fluids lost through sweating.
- Consider electrolyte replacement during prolonged exercise or when sweat losses are substantial.
For most everyday workouts, water is sufficient. Specialised electrolyte drinks may be useful in certain circumstances, but they are not necessary for everyone.
Seawater is not recommended as a hydration strategy because of its high salt concentration.
4. Allow enough time for rest and recovery
Muscle development does not happen only during exercise. Recovery is equally important.
During rest, the body repairs and adapts to the demands placed on it during training.
Most adults should aim for approximately seven to nine hours of sleep per night, although individual needs vary.
Insufficient sleep can affect exercise performance, recovery, appetite regulation and general wellbeing.
It is also important to allow adequate recovery between demanding workouts targeting the same muscle groups.
Short breaks during the day can help reduce mental fatigue and improve concentration, although they do not replace sufficient sleep.
Finding the right balance between training and recovery is essential for sustainable progress.
Can you build muscle and lose fat at the same time?
Yes, it is possible to build muscle and lose body fat simultaneously. This process is known as body recomposition.
It may be particularly achievable for people who are new to strength training, returning after a break or starting with higher levels of body fat.
However, the rate of progress varies according to factors such as training experience, age, nutritional intake, genetics and overall health.
Successful body recomposition generally involves:
- Regular resistance training to stimulate muscle growth and preserve muscle mass.
- Adequate protein intake to support muscle repair and development.
- Appropriate energy intake to encourage fat loss without excessively restricting the nutrients needed for recovery.
- Consistent cardiovascular activity to support cardiovascular health and overall fitness.
- Sufficient sleep and recovery to allow the body to adapt to training.
- Regular monitoring to assess changes in body composition and adjust the programme when necessary.
Progress should not be measured by body weight alone.
Changes in strength, waist measurements, body composition and physical performance can provide a more complete picture of your results.
Do you need supplements to build muscle and lose fat?
Supplements are not essential for achieving body recomposition.
For most people, a balanced diet that provides sufficient protein and energy should be the foundation of their nutritional strategy.
Protein supplements may be convenient when it is difficult to meet daily protein requirements through food alone.
Creatine monohydrate may also support strength and muscle development when combined with resistance training, although suitability should be assessed individually.
Branched-chain amino acid (BCAA) supplements are sometimes promoted for muscle recovery, but they have not consistently demonstrated additional benefits when overall protein intake is already sufficient.
Before introducing supplements, particularly if you have an existing medical condition or take medication, seek advice from a qualified healthcare professional.
Personalised training and nutrition at Clínica Planas
Building muscle while reducing body fat requires a combination of consistent exercise, balanced nutrition and realistic goals.
At Clínica Planas, our specialists can help develop personalised training and nutritional strategies adapted to your body composition, metabolic assessment, fitness level and lifestyle.
Through professional guidance and ongoing monitoring, it is possible to make informed adjustments to your programme and work towards sustainable improvements in strength, muscle mass and overall health.
The key is not to train harder or eat less at any cost, but to follow an approach that supports your health and delivers long-term results.
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