How Much Strength Training Per Week Do You Actually Need?

Ask five people at your gym how much strength training per week you actually need, and you’ll get five different answers. Twice is plenty. Four times, minimum. Six days a week or why even bother. It’s confusing — and that confusion stops a lot of people from ever picking up a dumbbell in the first place.

This week, science delivered an unusually clear answer. A major new study published in the British Journal of Sports Medicine followed more than 147,000 people for up to 30 years and found a genuine sweet spot: 90 to 120 minutes a week. That’s less than the running time of most films — and you don’t even have to do it all at once.

The 30-year study behind the numbers

This wasn’t a six-week trial on a dozen sports science students. Researchers pooled three of the world’s largest long-running health studies — the Health Professionals Follow-up Study and both Nurses’ Health Studies — covering 147,374 people. Participants checked in every two years, for up to three decades.

Each time, they reported how much strength training per week they were doing, whether that meant lifting weights or bodyweight exercises like press-ups, squats and lunges. That detail matters: strength training here didn’t mean barbells and chalk dust. If you’re doing press-ups on your living room floor, you count.

The average participant was 54 when the study began — these were ordinary adults juggling jobs and families, not athletes. Over the follow-up period, the researchers tracked who died and from what, then looked at how the risk lined up with people’s long-term training habits.

How much strength training per week is enough? 90 to 120 minutes

Here’s the headline finding. People who did 90 to 119 minutes of strength training a week had a 13% lower risk of dying from any cause — the biggest reduction seen at any training volume.

The real surprise? Beyond 120 minutes, the benefit didn’t keep climbing. More wasn’t better. Once you’ve banked your two hours, the study suggests your body has got the message.

And if 90 minutes still sounds like a stretch, smaller doses counted too. Even 1 to 29 minutes a week was linked with a 21% lower risk of dying from cancer. The first press-up really is the most valuable one.

If this sounds familiar, it should — the NHS already recommends strengthening activities at least two days a week, alongside 150 minutes of moderate aerobic activity. This study just puts a remarkably specific number on exactly how much strength training per week pays off most. Two 45-minute sessions, or three half-hour ones, land you right in the zone.

Strength training benefits go far beyond muscle

The same 90-to-119-minute range was linked with a 19% lower risk of death from cardiovascular disease — and, most strikingly, a 27% lower risk of death from neurological disease.

That second number deserves a moment. We tend to think of lifting as something for our arms, legs and the mirror, but this adds to a growing body of evidence connecting muscle strength with long-term brain health. Your brain, it turns out, appreciates a good squat.

A quick dose of honesty, because we’d rather be straight with you than sensational: this was an observational study. It can’t prove that strength training caused these lower risks, and exercise habits were self-reported. People who lift may do other healthy things too. But a clear pattern across 147,000 people and 30 years is very hard to dismiss — whatever the perfect prescription for how much strength training per week turns out to be.

Cardio and strength training: better together

The lowest risk of all belonged to people who combined the two. Those pairing high levels of aerobic exercise with 60 to 119 minutes of weekly strength work had a 45% lower risk of death compared with people who did little of either.

That echoes the Harvard research we covered recently on why mixing up your workouts could help you live longer — variety keeps showing up as one of the most powerful levers in fitness.

Aerobic exercise held its own too — any amount above the recommended weekly level was linked with a 26% to 43% lower risk of death. But here’s the key bit: adding strength training reduced risk further at almost every level of cardio the researchers looked at. The two aren’t rivals; they’re teammates.

So if you’re a runner who never lifts, or a lifter who treats the treadmill as a coat rack, the message is the same: adding the other half is probably the single biggest upgrade available to you.

What 90 minutes a week actually looks like

The beauty of knowing how much strength training per week to aim for is how achievable the number is. Two 45-minute sessions — say, Tuesday and Friday. Or three 30-minute ones if shorter visits suit your week better. That’s it.

If you’re starting out, keep it simple: a full-body session each time, built around four movements — a squat, a hinge (like a deadlift), a push (like a press-up) and a pull (like a row). Then gradually add a little weight or a few reps over time — a principle called progressive overload, and the engine behind all of it.

You don’t need a gym to hit the sweet spot, but the right one makes consistency much easier — somewhere with the kit you need and an atmosphere that makes you want to come back. You can browse gyms near you on Gymist and filter by the facilities that matter to you.

And if motivation is the sticking point, don’t white-knuckle it alone. People who train with someone else show up more often, push a little harder and enjoy it more — find a training buddy on Gymist who’s working towards the same thing.

One more practical pointer: leave at least a day between sessions that work the same muscles. The magic doesn’t happen while you’re lifting — it happens while you’re recovering. A Tuesday and Friday rhythm gives your body exactly the breathing room it needs.

Quick answers

Is 30 minutes of strength training a week enough? It is far better than none — even 1 to 29 minutes was linked with a lower risk of cancer death. But the biggest overall benefits appeared at 90 to 120 minutes.

How much strength training per week do beginners need? Start with two 30-minute full-body sessions and build from there. Consistency matters far more than volume in your first few months.

Can you do too much? The study found no extra longevity benefit beyond 120 minutes a week — though if you enjoy training more than that, there is no harm suggested either.

The takeaway: two sessions, a lifetime of payoff

Ninety to 120 minutes a week. That’s roughly 1% of your waking hours, in exchange for a meaningfully lower risk of heart disease, neurological disease and early death. Few things in life offer a return like that.

The question of how much strength training per week you need finally has a number attached. So don’t overthink the programme, the split or the supplements. Pick two days, pick four movements, and start counting your minutes. Your future self — heart, brain and all — will thank you for every single one.