How Can I Reduce My Body Fat Percentage?

Losing body fat is straightforward in theory and difficult in execution. The theory: eat less energy than you burn, weighted toward protein, while training in a way that signals your body to keep muscle. The execution: doing that consistently for 8–16 weeks.

This guide breaks the process into five fundamentals. Each one earns its place by being evidence-based and easy to apply.

Fundamental 1 — calorie deficit (the only thing that actually loses fat)

Body fat comes off when energy out exceeds energy in. Start with a 300–500 kcal/day deficit below your TDEE. Smaller deficits lose fat slower but stick better; larger deficits accelerate loss but risk muscle and adherence.

Fundamental 2 — protein protects muscle

In a deficit, protein intake is the single biggest determinant of whether you lose mostly fat or mostly muscle. Research targets sit at 1.6–2.4 g/kg of body weight. Most people benefit from the higher end during cuts.

Distribute across 3–5 meals of 20–40 g each — protein synthesis benefits from spacing rather than one big hit.

Fundamental 3 — resistance training

Lifting tells your body to keep muscle. Without it, even with high protein, you can lose 25–30% of weight loss as lean mass. Two to four sessions per week, hitting each major muscle group twice, is plenty.

Maintain your training volume during the cut. Now is not the time to start new high-rep gimmicks — keep doing what you were doing at maintenance.

Fundamental 4 — increase NEAT and steady cardio

Non-exercise activity (steps, fidgeting, standing) is the easiest TDEE lever. Adding 3,000 daily steps adds ~150 kcal/day. Two weekly steady-state cardio sessions of 30 minutes add another 300 kcal/week. Combined, that's effectively a deeper deficit without eating less.

Fundamental 5 — sleep and recovery

Chronic short sleep raises ghrelin (hunger), lowers leptin (fullness), and increases cortisol — all working against you. Aim for 7+ hours. People who sleep 8.5 vs 5.5 hours during a cut lose 55% more fat and 60% less muscle in matched studies.

Worked example

A 90 kg man with 24% body fat (21.6 kg fat, 68.4 kg lean). His TDEE is 2,800 kcal. Cut plan:

Calories: 2,300/day (500 kcal deficit). Protein: 180 g (2 g/kg). Training: 3 lifting sessions per week. Steps: 10,000/day. Sleep: 7.5h.

Over 16 weeks he loses ~8 kg of fat and gains ~1 kg of muscle. New stats: 83 kg, 16% body fat, 69.4 kg lean. Fat mass dropped 35%; lean mass grew slightly.

Common mistakes and misconceptions

• Crashing too hard. 1,000+ kcal deficits work for 4 weeks then crater your metabolism and willpower.
• Cutting carbs to zero. Carbs don't make you fat — overall calories do. Going zero-carb often hurts training performance.
• Skipping protein for 'clean' food. 1,200 kcal of broccoli isn't a fat-loss diet — it's a setup for binges.
• Doing only cardio. Cardio alone loses fat and muscle in roughly equal portions. Lifting is what biases loss toward fat.

Practical tips for fat loss

• Set a weekly weight loss target of 0.5–1% of body weight. Faster than that usually loses muscle.
• Take diet breaks — eat at maintenance for 1 week every 8–10 weeks of cutting to recover hormonally.
• Track scale weight as a 7-day rolling average. Daily numbers will gaslight you with water swings.
• Recalculate TDEE after every 5 kg of loss — your deficit needs to scale down with you.

Related questions

Keep reading on this site

• TDEE & Body Fat Calculator — set your fat-loss calorie target
• Navy body fat calculator — track body fat over the cut
• What is a calorie deficit? — the foundation of fat loss
• Calories for weight loss — deficit sizing