How long does it take to build muscle? Realistic numbers

Muscle grows slower than most people hope and faster than most people quit. You'll get stronger within weeks, see a difference in a few months, and keep building for years, just more slowly each year.

What to expect

• First few weeks: strength jumps as you learn the lifts. Not much new muscle yet.
• First year: the fastest growth you'll ever have, if you train hard, eat enough protein and sleep well. Clear changes in the mirror and in how clothes fit.
• Years two and three: roughly half as fast as year one.
• After that: slow and steady. Progress is measured in small strength gains and a little more size each year.

How to tell it's working

The mirror is the slowest and least reliable signal. Better ones: your weights or reps going up in the 6 to 15 rep range, arm and chest measurements creeping up while your waist stays put, and body weight rising slowly on a surplus. See how to take body measurements.

What speeds it up

• Enough hard sets: about 10 to 20 a week per muscle. See how many sets per week.
• Adding weight or reps over time. See progressive overload.
• Protein and a small surplus. See lean bulk.
• Consistency: months of training, not weeks. See how to stay consistent.