Can you really lose fat and gain muscle at the same time?

Yes, especially if you are a beginner, returning after a break, overweight, or using optimised nutrition timing. The process is slower than dedicated bulking or cutting, but research supports simultaneous fat loss and muscle gain with adequate protein and progressive resistance training.

How much protein do I need for body recomposition?

Research suggests 1.6-2.2g of protein per kilogram of body weight per day for body recomposition. This calculator uses the upper end (2.2g/kg) to maximise muscle protein synthesis while in a periodic calorie deficit.

How long does body recomposition take?

Body recomposition is a slower process than traditional bulking or cutting. Expect visible changes over 8-16 weeks. Track progress with measurements, photos, and strength gains rather than relying on the scale, since you may be gaining muscle and losing fat simultaneously.

Should I do cardio during body recomposition?

Light to moderate cardio (walking, cycling) on rest days is beneficial for fat loss and recovery. Avoid excessive cardio that may interfere with muscle recovery. Prioritise resistance training 3-5 days per week for best results.

Body Recomposition Calculator

Body recomposition means losing fat and gaining muscle at the same time. Unlike traditional bulk/cut cycles, recomposition uses strategic calorie and macro cycling around your training days to fuel muscle growth while tapping into fat stores on rest days.

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How It Works

Your TDEE is calculated using the Mifflin-St Jeor equation and activity multiplier. On training days, you eat at a slight surplus (10% above TDEE) with high protein and carbs to fuel muscle growth. On rest days, you eat at a moderate deficit (20% below TDEE) with high protein and fat to promote fat burning. Protein stays high at 2.2g per kg of body weight throughout.

Quick Reference

Day Type	Calories	Protein	Carbs	Fat
Training Day	TDEE + 10%	2.2 g/kg	High (remaining cals)	20% of cals
Rest Day	TDEE - 20%	2.2 g/kg	Low (remaining cals)	35% of cals
—	—	—	—	—
Weekly Avg (4 train / 3 rest)	Near maintenance	Constant	Cycling	Cycling

Protein stays constant at 2.2g per kg body weight every day. Carbs and fat are cycled around training to optimise performance and recovery.

Frequently Asked Questions

Can you really lose fat and gain muscle at the same time?: Yes, especially if you are a beginner, returning after a break, overweight, or using optimised nutrition timing. The process is slower than dedicated bulking or cutting, but research supports simultaneous fat loss and muscle gain with adequate protein and progressive resistance training.
How much protein do I need for body recomposition?: Research suggests 1.6-2.2g of protein per kilogram of body weight per day for body recomposition. This calculator uses the upper end (2.2g/kg) to maximise muscle protein synthesis while in a periodic calorie deficit.
How long does body recomposition take?: Body recomposition is a slower process than traditional bulking or cutting. Expect visible changes over 8-16 weeks. Track progress with measurements, photos, and strength gains rather than relying on the scale, since you may be gaining muscle and losing fat simultaneously.
Should I do cardio during body recomposition?: Light to moderate cardio (walking, cycling) on rest days is beneficial for fat loss and recovery. Avoid excessive cardio that may interfere with muscle recovery. Prioritise resistance training 3-5 days per week for best results.

Body Recomposition Macro Cycling

TDEE = BMR x Activity Multiplier Training Day = TDEE x 1.10 (10% surplus) Rest Day = TDEE x 0.80 (20% deficit) Protein = 2.2g x body weight (kg) daily

BMR: = Basal Metabolic Rate from Mifflin-St Jeor equation
TDEE: = Total Daily Energy Expenditure

This approach works best for beginners, those returning to training, or those with higher body fat. Advanced lifters may need dedicated bulk/cut cycles for optimal results.

Related Tools

Macro Calculator

Calculate your ideal daily macros (protein, carbs, fat) based on your body stats, activity level, and goal - weight loss, maintenance, or muscle gain.

Protein Intake Calculator

Calculate your daily protein needs based on body weight, activity level, and fitness goal. Includes Australian dietary guidelines.

TDEE Calculator

Calculate your Total Daily Energy Expenditure using the Mifflin-St Jeor equation. See how many calories and kilojoules you burn per day.

Disclaimer

This calculator provides estimates for informational purposes only and should not be considered medical advice. Individual results may vary based on factors not captured by these formulas. Consult a healthcare professional before making changes to your diet or exercise routine, especially if you have any existing health conditions.