How do I build muscle?

Muscle grows when you train it hard enough, often enough, and give it the material and rest to rebuild. In practice that means training each muscle roughly twice a week with challenging sets taken near failure, progressing the load or reps over time, eating enough total calories and protein, and sleeping well.

The four requirements

• Mechanical tension: Sets taken close to failure, where the final reps are genuinely hard, are the main driver.
• Enough volume: Roughly 10 to 20 hard sets per muscle per week for most people, spread across two or more sessions.
• Progression: The same weight for the same reps forever produces the same body forever.
• Energy and protein: Maintenance calories or a small surplus, with about 1.6 to 2.2 g of protein per kg of bodyweight daily.

Choosing exercises

Build the session around compound movements, then add isolation work for muscles that need direct attention. A lower-body day might use a back squat, a Romanian deadlift, and a calf raise. An upper day might use a dumbbell bench press, a lat pulldown, a face pull, and direct arm work.

How hard each set should be

Stop most sets one to three reps short of failure. That produces growth comparable to training to failure while leaving you able to complete the rest of the session and recover for the next one. Reserve true failure for isolation exercises where the risk and fatigue cost are low.

Eating for it

A surplus of roughly 10 percent above maintenance supports growth without excessive fat gain. Larger surpluses add fat faster than muscle, because the rate at which you can build tissue is limited. Spread protein across three to five meals rather than concentrating it in one.

Realistic expectations

Beginners might gain around 0.5 to 1 percent of bodyweight per month in the first year, and considerably less after that. Visible change usually takes 8 to 12 weeks. Track with photographs and tape measurements every four weeks, since the mirror and the scale both lie on any given day. The full picture is in Hypertrophy and Muscle Growth.