The goal of simultaneously losing fat and gaining muscle, known as body recomposition, is often seen as the holy grail of fitness. Many believe you must choose between a “bulk” or a “cut”, but the science shows that with the right plan, you can achieve both. This guide provides an evidence-based workout and nutrition strategy to help you build a stronger, leaner physique.
We’ll break down the physiology, explain the programming, and give you a detailed plan to follow. By understanding the “how” and “why”, you can take control of your fitness journey and transform your body.
Deciding whether to prioritize fat loss or muscle gain first depends on your starting body composition and training experience. As a general rule, your starting body fat percentage is the most important factor; leaner individuals (under 15% for men, 25% for women) should prioritize muscle gain, while those with higher body fat will benefit more from prioritizing fat loss.
Your experience level also matters. Beginners can build muscle and lose fat quite easily because their bodies are highly responsive to training. An intermediate or advanced lifter, who is closer to their genetic potential, will need a more dialed-in approach to continue making progress (1).
Here’s a simple breakdown:
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Yes, you can absolutely lose fat and gain muscle at the same time, and this process is supported by scientific evidence. Body recomposition works because fat and muscle are two separate tissues. You can be in a net caloric deficit, prompting your body to “withdraw” energy from fat stores, while simultaneously providing a stimulus for muscle growth through resistance training and adequate protein intake, which “deposits” new muscle tissue (2).
Think of it like having two different bank accounts. You can withdraw $20 from one account (fat loss) while depositing $5 into another (muscle gain). Your net balance has decreased, but you still made a gain in one area. This is why the scale is not always the best indicator of progress.
Body recomposition is most common and happens most rapidly in four groups (1):
However, research has shown that even trained individuals can achieve body recomposition. Studies on collegiate athletes and highly trained lifters have demonstrated simultaneous fat loss and muscle gain when nutrition and training are properly managed (1). It is not an “impossible” goal, but one that requires a smart, consistent plan.
Read more: Beginner Gym Ab Workout Routine: 4 Exercises to Do
The fundamental principles of body recomposition apply equally to men and women, but there are some nuances to consider for an effective workout plan for weight loss and muscle gain for females.
A successful body recomposition plan works by strategically managing energy balance, macronutrients, and training to signal the body to build muscle and burn fat. It’s a more nuanced process than simply cutting or bulking, so tracking your progress is crucial. You’re no longer just chasing a number on the scale; you are reshaping your body’s composition.
To track your progress accurately, you need a “recomp toolkit”. This moves beyond just the scale to give you a complete picture of the changes happening.
Your Mandatory Recomposition Toolkit
By using these tools together, you can make informed adjustments to your plan. For instance, if your weight is stable but your waist is smaller and photos show more definition, you are successfully recomposing.
For those who are looking for an effective approach, explore the principles of a body recomposition diet.
The best workout for losing fat and gaining muscle is resistance training focused on progressive overload (1). While diet creates the caloric deficit needed for fat loss (8), weight training provides the essential stimulus for your body to build and retain muscle (9). Without it, a significant portion of weight lost in a deficit will come from muscle tissue.
Your workout plan should be built on a foundation of compound movements, supplemented with isolation exercises to target specific muscle groups.
Key Training Principles
Read more: 3-Day Full-Body Workout Plan at Home (Dumbbell Only Required)
An effective plan combines the principles above into a structured, progressive weekly schedule.
Training frequency is also important; research shows that training a muscle group twice per week is generally superior for hypertrophy compared to once per week (16). This makes “bro splits” (e.g. chest day, back day) less optimal for most people.
Instead, splits like 3-day full-body or 4-day upper/lower allow you to hit each muscle group twice within a week.
This program is designed to be flexible. You can have a 4-day upper/lower split, or a 3-day full-body workout. The exercises listed are examples – feel free to substitute with similar movements based on equipment availability and preference.
Keep movement patterns consistent (squat/hinge/push/pull) and swap only like-for-like (e.g. barbell row → chest-supported row) if needed.
Option 1: 4-Day Upper/Lower Split
Day 1: Upper Body
Day 2: Lower Body
Day 3: Rest or Active Recovery
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Day 4: Upper Body
Day 5: Lower Body
Days 6 and 7: Rest or Active Recovery
Option 2: 4-Day Body Part Split (with 2x frequency for key areas)
Option 2: 3-Day Full-Body plan (12-week progression)
Day 1: Full Body A
Day 2: Rest or Active Recovery
Day 3: Full Body B
Day 4: Rest
Day 5: Full Body C
Days 6 and 7: Rest or Active Recovery
Lose Fat Gain Muscle Workout Plan at Home (Minimal Equipment)
No gym? No problem. You can still achieve great results with minimal equipment such as resistance bands and dumbbells. The key is to apply progressive overload by increasing reps, adding sets, or using more challenging exercise variations.
For more ideas on how to craft a program that works for you, check out the best way to gain muscle and lose fat.
The best cardio for muscle gain and fat loss is the type that interferes the least with your resistance training recovery and performance. Since your primary muscle-building stimulus comes from lifting, cardio should be used as a tool to help create a larger daily caloric deficit, not as the main driver of hypertrophy. An “effective minimum” approach could be considered the best. It really comes down to your fitness goals and what you want to get out of your training.
Low-Intensity Steady State (LISS)
This is the preferred form of cardio for body recomposition. LISS, such as incline walking, cycling, or using the elliptical at a moderate pace (around 60-70% of max heart rate), is easy to recover from and has a minimal impact on strength and hypertrophy (18).
Frequency: 1-3 sessions per week.
Duration: 20-45 minutes per session.
High-Intensity Interval Training (HIIT)
HIIT involves short bursts of all-out effort followed by recovery periods (e.g. 30 seconds sprinting, 60 seconds walking) (19). While this is time-efficient, it can be very taxing on the central nervous system and interfere with lifting recovery.
Frequency: Use sparingly, a maximum of 1-2 sessions per week.
Placement: Perform HIIT on a separate day from heavy leg training or after your lifting session, never before.
Non-Exercise Activity Thermogenesis (NEAT)
NEAT is the energy you burn from daily activities outside of formal exercise, such as walking, fidgeting, or taking the stairs (20). Increasing your NEAT by aiming for a daily step goal (e.g. 8,000-10,000 steps) is a highly effective, low-impact way to increase calorie expenditure without causing training fatigue.
If you’re gaining muscle but not losing fat, the simple answer is that you are not in a consistent caloric deficit. While resistance training sends the signal to build muscle, fat loss is dictated by energy balance (21). Your body will not tap into its fat stores for energy if you are providing it with enough (or too many) calories from food.
Here are the most common reasons this happens and how to fix them:
You might be accurately tracking your workouts and protein, but you are consuming too many calories overall. This is often unintentional, caused by underestimating portion sizes, “hidden” calories in sauces and oils, or weekend splurges that offset your weekday discipline.
The Fix: Use the “mandatory toolkit” to conduct a monthly self-assessment. If your weekly average weight is increasing or stagnant and your waist measurement isn’t decreasing, reduce your daily caloric intake by 100-250 calories. Remove these calories from carbs and/or fats, but never protein.
Your structured workouts are great, but your total daily energy expenditure (TDEE) is lower than you think. A sedentary job or lifestyle outside the gym means your “calories out” are low.
The Fix: Instead of cutting more calories, increase your activity. Add one or two 30-minute LISS cardio sessions per week, or focus on increasing your NEAT by setting a daily step goal.
Lack of sleep and high stress levels can sabotage fat loss. Sleep deprivation and stress raises cortisol and ghrelin (the hunger hormone), which makes it harder to stick to your diet and encourages fat storage (22, 23).
The Fix: Prioritize 7-9 hours of quality sleep per night. Implement stress management techniques like meditation, walking, or enjoyable hobbies. Recovery isn’t always passive; it’s an active part of your plan.
Weightlifting is more effective for long-term fat loss than cardio. While a cardio session might burn more calories minute-for-minute (24), resistance training builds muscle, which increases your resting metabolic rate (25). This means you burn more calories 24/7, even at rest. The best approach combines weight training as the foundation with cardio used as a tool to increase the caloric deficit and improve cardiovascular performance. Whether fasting burns fat or muscle depends on the context, particularly your protein intake and training stimulus. In a caloric deficit, your body will break down both fat and muscle for energy. However, combining fasting with high-protein meals during your eating window and consistent resistance training can help preserve (and even build) muscle while prioritizing fat as the primary fuel source (26). Very long fasts with inadequate protein are more likely to result in muscle loss (27). For individuals engaged in resistance training for body recomposition, a protein intake of approximately 1.5 grams per kilogram of body weight per day (or about 0.7 grams per pound) is a scientifically supported target (28). Research has shown that this amount synergistically enhances the effects of resistance training on muscle mass and strength. Some evidence suggests a sliding scale of 1.2-1.6 g/lb of lean body mass, with leaner individuals needing more (29). Consuming more than 1.6 g/kg/day has shown diminishing returns for most people (30). Yes, you should try your best to continue to lift heavy when cutting (in a caloric deficit). Lifting with intensity sends a strong signal to your body to retain muscle mass. If you switch to light weights and high reps, you remove the primary stimulus for maintaining strength and muscle. Your goal should be to maintain your strength as much as possible; this is a key sign that you are preserving muscle tissue while losing fat. However, you should remember that being in a calorie deficit means that you are providing your body with less energy each day. This could potentially lead to decreases in strength as you continue to drop body fat, so don’t be alarmed if you’re not hitting PRs in every gym session. Frequently Asked Questions
Does cardio or weightlifting burn more fat?
Does fasting burn fat or muscle?
How much protein is needed to gain muscle?
Should I lift heavy when cutting?
Body recomposition is an achievable goal that requires a smart, evidence-based approach. The synergy between progressive resistance training and a high-protein, calorie-controlled diet is the engine of your transformation. Forget the myth that you must choose between losing fat or gaining muscle. By implementing the principles and plans in this guide, you can do both.
Use the tracking tools to monitor your progress, be patient and consistent, and make adjustments based on the data. Your body is an adaptable machine, and with the right inputs, you can guide it toward the strong, lean physique you desire.
If you want to create a personalized eating strategy, learn about the best diet for weight loss and muscle gain.
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