Can You REALLY Build Muscle After 40?

If you're in your 40s, 50s or beyond, you may have wondered:

Can I actually still build muscle? Or am I just trying to hang on to what I have?

In short: Yes, you can absolutely still build muscle.

There is a persistent idea that once we reach a certain age, building new muscle becomes incredibly difficult and the best we can hope for is to slow the decline.

Thankfully, that isn't true.

Our bodies continue to respond to resistance training well into our 50s, 60s, 70s and beyond. Even if you've never strength trained before, it is not too late to start.

What the research says

A 2025 systematic review and network meta-analysis looked at 151 randomized trials involving more than 6,300 adults ages 60 and older.

Researchers found that resistance training improved lean body mass, muscle size, strength and physical function.

Yes, this particular review looked at adults 60 and older. But that makes the takeaway even more encouraging: your opportunity to build muscle does not disappear in your 40s or 50s.

And here's the part I really want you to hear:

You do not have to live in the gym to benefit.

Lower-volume resistance training produced meaningful improvements in lean mass, muscle growth and physical function. Higher training volumes may be helpful if your goal is to maximize strength, but more is not automatically better—and less does not mean pointless.

That matters because one of the biggest obstacles I see is women believing that if they can't train four or five days a week, it isn't worth starting.

It is.

Two well-designed strength workouts each week can absolutely move you forward. Three or four may be appropriate if you enjoy it, have the time and can recover from it. But you do not need to cram as much exercise as possible into your week to make it count.

It's time to fight the curve

As we age, we become more susceptible to sarcopenia, the gradual loss of muscle mass and strength. Bone density can also decline, increasing the risk of osteopenia and osteoporosis.

That does not mean decline is inevitable.

Resistance training gives us a powerful way to fight that curve. Building and maintaining muscle helps support our joints and bones, improves balance and makes everyday life easier.

We're not just training for how our bodies look today. We're investing in what we want them to be capable of at 60, 70, 80 and beyond.

What does it actually take to build muscle after 40?

Strength train consistently

Two to four sessions per week is plenty for most people. Aim to train all the major muscle groups across your week.

Make those sessions challenging

Your muscles need a reason to adapt. Over time, that might mean lifting more weight, completing another repetition, adding a set or progressing to a more challenging version of an exercise.

If your workouts always feel comfortable and never change, your body has very little reason to change either.

Eat enough protein

Training provides the stimulus, but your body needs the raw materials to build muscle. Around 1.2–1.6 grams of protein per kilogram of body weight per day is a useful target for many active adults, ideally spread across several meals.

Don't spend your entire life dieting

Building muscle requires energy. You don't necessarily need to eat in a large calorie surplus, but continually pushing your calories lower while expecting your body to build a significant amount of muscle is not a great combination.

Spending time around maintenance calories can be incredibly valuable.

Give yourself time to recover

Training creates the stimulus for muscle growth, but the adaptation happens afterward. Your sleep, rest days and overall stress load all affect what you can recover from.

The goal is not to see how much exercise you can cram into a week. It's to find an amount you can recover from, repeat consistently and continue progressing.

Look for the quieter signs that it's working

Muscle building is a slow game. You may notice improvements in strength fairly quickly, but meaningful changes in muscle mass happen over months and years—not days and weeks.

So don't abandon your plan because you can't see a dramatic difference after four weeks. Instead, ask:

• Are your weights increasing?

• Can you complete more repetitions?

• Do you feel stronger?

• Are everyday tasks becoming easier?

• Is your body shape beginning to change?

Those small improvements accumulate.

Train consistently. Challenge your muscles. Eat enough protein and enough total food. Recover properly. Then keep going.

Being over 40 isn't a reason to lower your expectations of what your body can do.

It's a very good reason to start investing in its strength.

Ready for a training plan you can actually follow?

The Elemental Training Membership gives you a progressive plan without nutrition coaching. It includes three- and four-day programs, gym and home options, progress tracking in our app, direct access to your trainer and monthly coaching calls.

Our next eight-week training block drops September 13. Join us here.