How to Lean Bulk: Gain Muscle Without Too Much Fat

You can build some muscle without a calorie surplus, especially as a beginner. But for most people, and especially after the first year of training, eating a bit more than you burn makes building muscle much easier. The question is how much more.

Dirty Bulk vs Lean Bulk

A "dirty bulk" means eating as much as possible, often with lots of junk food. The scale goes up fast, but much of that weight is fat, which you later have to diet off. A lean bulk uses a small, controlled surplus that gives your body what it needs to build muscle without excessive fat gain.

How Big a Surplus?

A common recommendation is roughly 5 to 10 percent above maintenance calories, which often works out to about 200 to 400 extra calories per day. If you do not know your maintenance, see our guide to maintenance calories.

How Fast Should You Gain?

• Beginners: around 0.5 to 1 percent of body weight per month can be reasonable, since they build muscle quickly.
• Intermediate and advanced lifters: slower, around 0.25 to 0.5 percent per month.

Track your weekly average body weight. If it climbs much faster, reduce calories a little. If it does not move for three or four weeks, add a little.

What to Eat

• Protein: around 1.6 grams per kilogram of body weight per day. See how much protein you need.
• Carbohydrates: fuel for training. Rice, potatoes, oats, bread, pasta and fruit.
• Fats: enough for health and hormones, roughly 20 to 35 percent of calories.
• Volume tricks: if you struggle to eat enough, use calorie-dense foods like nuts, nut butters, olive oil, whole milk and dried fruit, and drink some calories in shakes or smoothies.

Train for It

A surplus only builds muscle if training gives your body a reason to. Follow a structured program with progressive overload, enough volume and good recovery. Without that, the extra calories mostly become fat.

How Long?

Many people run lean bulks for several months, then move to a maintenance phase or a short fat-loss phase. There is no need to bulk year-round, and no need to diet frequently either.