How Much Strength Training Do You Really Need? What the Research Says

Walking gets most of the attention in health advice, and for good reason. But a growing body of research suggests that the other half of the exercise guidelines, the part about building muscle, deserves just as much space on your calendar.

The good news: the amount that seems to matter is smaller than many people assume, and you don’t need a gym membership or heavy barbells to get there. Here’s what the official guidance says, what a large new study adds, and how to start without overdoing it.

The Official Baseline

The CDC’s guidelines for adults have two parts. The first is aerobic activity: 150 minutes a week of moderate-intensity exercise, such as brisk walking, or 75 minutes of vigorous activity, or a mix of the two.

The second is muscle-strengthening activity on at least two days a week, working all the major muscle groups: legs, hips, back, abdomen, chest, shoulders and arms. That can mean lifting weights, but it can also mean resistance bands or exercises that use your own body weight.

Plenty of people who hit the walking target skip the strength part entirely. Recent research suggests that’s a missed opportunity.

What a 147,000-Person Study Found

In June 2026, the British Journal of Sports Medicine published one of the largest long-term looks at strength training and death rates so far. Researchers pooled data from three long-running U.S. cohorts, the Health Professionals Follow-up Study, the Nurses’ Health Study and the Nurses’ Health Study II, covering 147,374 people with an average starting age of 54.

Participants reported their exercise habits on questionnaires every two years, for up to 30 years. Over that time, 35,798 of them died. The researchers then compared death rates across different amounts of weekly strength training.

The Sweet Spot

People who did 90 to 119 minutes of strength training a week had a 13% lower risk of dying from any cause during the study than those who did none.
In that same range, the risk of death from cardiovascular disease was 19% lower, and the risk of death from neurological disease was 27% lower.
Above about 120 minutes a week, the benefit stopped growing. More didn’t appear to be better.
Lower amounts still counted: 1 to 59 minutes and 60 to 119 minutes a week were linked to a 7% to 11% lower risk, compared with people who did little aerobic exercise and no strength training.

Cancer deaths followed a different pattern. Lower risk showed up only at the smaller doses, 21% lower at 1 to 29 minutes a week and 18% lower at 30 to 59 minutes.

Strength Plus Cardio

The most striking results came from combining the two kinds of exercise. People who got a solid amount of aerobic activity and also did 60 to 119 minutes of strength training a week had a 45% lower risk of death than people who did little of either. Among the most aerobically active participants, risk was 53% to 58% lower regardless of how much strength training they did, which suggests that for very active people, cardio was doing much of the heavy lifting.

Put plainly: if you already walk, adding an hour or two of strength work a week appears to be a good complement, not a replacement.

The Catch

This was an observational study, so it shows an association, not cause and effect. People who lift weights may differ in other ways, such as diet, income or overall health, that also affect how long they live. The exercise data were self-reported. The questionnaires didn’t capture how hard or how long each session was, and calisthenics and Pilates weren’t counted as strength training. The participants were all health professionals, who may not reflect the wider population. The authors themselves say no firm conclusions about cause and effect can be drawn.

Why Muscle Matters More as You Age

Part of the case for strength training is what happens without it. Writing for The Conversation, Newcastle University researcher Christopher Hurst describes sarcopenia, the age-related loss of muscle mass and strength. It reduces mobility and physical function and raises the risk of falls and fractures, and it is especially common after age 70. People living with several long-term health conditions are at higher risk.

Hurst calls strength training the most effective way to maintain or improve muscle strength with age. Mayo Clinic lists a broader set of benefits: it helps keep muscle as you age, supports bone strength and may lower osteoporosis risk, improves balance and lowers the risk of falls, and may ease symptoms of conditions including arthritis, heart disease, diabetes, depression and anxiety.

Does One Session a Week Count?

If two sessions a week sounds like a lot, here’s some encouragement. According to Hurst, even a single strength session a week can produce meaningful gains, particularly for people who are new to training. He suggests most adults aim for once or twice a week and says daily training isn’t necessary.

That fits with the study above, where even modest weekly amounts were linked to lower risk. One session is a perfectly good starting point, and two lets you meet the CDC guideline.

How Heavy Is Heavy Enough?

You don’t need to lift heavy to benefit, but you do need to work hard. Hurst writes that doing 20 to 25 repetitions with a lighter weight can produce similar improvements to lifting a heavier weight about 10 times, as long as the effort is high. Your muscles should feel tense and tired by the end of a set.

Mayo Clinic offers a practical rule of thumb: choose a weight or resistance that tires your muscles at about 12 to 15 repetitions. For most people, a single set of 12 to 15 reps is enough to build muscle, especially if the last few reps are very hard. When the reps start to feel easy, increase the resistance.

A Simple Way to Start

Cover the Major Muscle Groups

Pick a handful of moves that together work your legs, hips, back, abdomen, chest, shoulders and arms. Lower-body exercises such as squats are a good foundation, and body-weight versions are fine to begin with. You can add resistance bands, free weights or machines later.

Warm Up and Mind Your Form

Mayo Clinic suggests warming up with a few minutes of brisk walking or other light aerobic activity. Use good technique to reduce the risk of injury. A trainer can help you learn it, and remember to keep breathing during each exercise rather than holding your breath.

Build in Rest

Give each muscle group a full day of rest between workouts. If an exercise hurts, stop, then try a lighter weight or come back to it in a few days.

Progress Gradually

Start easy and increase the challenge over time. Hurst recommends adapting exercises around joint pain or long-term conditions, getting qualified supervision where needed, and pairing training with enough protein in your diet. If you have a chronic condition or other safety concerns, check with your healthcare professional before starting.

The Bottom Line

The CDC recommends muscle-strengthening activity on at least two days a week, alongside 150 minutes of moderate aerobic activity.
In a large observational study, about 90 to 120 minutes of strength training a week was linked to the lowest risk of death, with no extra benefit beyond that.
Lighter weights work if you push close to fatigue, and even one session a week is a reasonable place to begin.

In other words, the target is achievable: two sessions of 45 minutes to an hour, or three shorter ones, gets most people there.

This article is for general information, not medical advice.

Welcome to Contoh

Welcome to Contoh

Welcome to Contoh

Welcome to Contoh

Let People Leave the Group Chat in Peace

Coffee Drinkers Have a Different Gut Mix, a Small Study Finds. Decaf May Have Perks of Its Own

Waymo Takes Out Its First-Ever Loan, Borrowing $5 Billion to Expand Robotaxis

Google’s Medical AI Chatbot Got Its First Real-Clinic Test. Here’s How It Did