How Much Strength Training Do Women Over 40 Actually Need? Science Finally Has the Answer

For years, women have been told to strength train more. More sessions, more intensity, more effort. And while the direction is right, the "more is better" message has left a lot of women either overwhelmed or wondering if they're doing enough.

Now we have an answer. A real one. From one of the largest and longest studies ever conducted on this topic.

And it changes everything about how we think about strength training after 40.

How Much Strength Training Do Women Over 40 Need? What the Research Says

A massive study published in the British Journal of Sports Medicine — highlighted by the Harvard T.H. Chan School of Public Health — followed 147,374 people for up to 30 years. The findings are striking.

The sweet spot for longevity? 90 to 120 minutes of strength training per week.

Women who trained in that range had a 13% lower risk of dying from any cause over the 30-year study period. They also had a 19% lower risk of dying from cardiovascular disease, and a 27% lower risk of dying from neurological diseases like dementia and Alzheimer's.

Let that land for a moment. 27% lower risk of Alzheimer's. From strength training.

And here's the part that matters: doing more than 120 minutes per week showed no additional benefit. The gains plateaued. You don't need to live in the gym. You need to hit the sweet spot — and the sweet spot is 90 to 120 minutes a week.

Two 45-minute sessions. Or three 30-minute sessions. That's it.

But there's a layer to this that most coverage of the study isn't talking about. And it's the part I find most interesting.

The Combination Is Where the Real Power Is

The study also looked at what happened when women combined strength training with aerobic exercise — things like walking, cycling, swimming.

The results were remarkable. Those who did both had among the lowest mortality risks in the entire study — up to 45% lower than those who did neither.

45%.

Not from extreme training. From doing both things — consistently, across a lifetime.

This is not a coincidence. It's biology. Strength training builds and preserves muscle, supports bone density, and improves how your body handles load. Aerobic movement — even just walking — regulates cortisol, supports cardiovascular health, and keeps the nervous system balanced.

You need both. Not one instead of the other. Both.

Why Mobility Is the Missing Piece Most Studies Don't Measure

Here's what this research doesn't capture — and what I think about every time I read studies like this.

The 90-120 minutes figure measures strength training volume. What it doesn't measure is the quality of that training, or whether the body doing it can actually move well enough to sustain it over time.

Women who strength train without addressing mobility and joint health are more likely to accumulate wear and tear, develop compensations, and eventually have to stop. And stopping is exactly what cancels out the long-term benefits the research is describing.

This is where Pilates becomes not an addition to your strength training — but a prerequisite for sustaining it.

Mobility work, end-range strengthening, breath integration, proprioceptive awareness — these are what keep your joints healthy enough to keep lifting. They're what allow you to train at 50, 60, 70 the same way you did at 40. They're what turn 90 minutes a week into a lifetime practice rather than something you had to stop.

This is exactly why I built SoulSculpt Method around the integration of strength and Pilates. Not because it feels good — though it does — but because it's the most intelligent way to make the training sustainable over the long term.

What 90 Minutes Actually Looks Like

I want to make this concrete, because I think one of the reasons women don't strength train consistently is that they can't picture what it actually looks like in a real week.

Here's what I recommend — and what I do myself:

One 45-minute SoulSculpt session — live on Thursdays or from the replay library. Full body, Strength x Pilates integrated. Compound movements, progressive load, Pilates precision built into every rep. This covers your strength, your mobility, your nervous system, your slow-twitch and fast-twitch muscle fibres in one session.

Walking — regularly, outside. This is your aerobic foundation. The study is clear that combining strength with aerobic movement is where the biggest longevity gains are. You don't need to run. Walk. Consistently.

That's one session plus daily walking. Already you're building the combination the research says matters most.

From September, I'm adding something that takes this to exactly where the science says the sweet spot is.

What's Coming in September: The Missing Piece

From September, the SoulSculpt library will include StrongSculpt — three 15-minute compound strength sessions per week, designed specifically for women coming from a movement background.

Not beginners in the generic sense. Women who know how to move their bodies — who've practiced yoga, Pilates, bodyweight training — but who haven't yet built a progressive strength practice with weights.

Three sessions of 15 minutes each. Compound movements. Progressive load. Fast-twitch fibre focused. Designed to be done alongside your regular SoulSculpt practice.

Here's what that weekly total looks like:

• 1 × 45-minute SoulSculpt — strength, Pilates, mobility, nervous system

• 3 × 15-minute StrongSculpt — compound fast-twitch focused strength

Total: 90 minutes per week. Exactly the sweet spot the Harvard research identified.

Not by accident. By design.

You Don't Need More. You Need the Right 90 Minutes.

The message from 30 years of research and 147,000 people is not "train harder." It's "train consistently, train intelligently, and combine it with movement you can sustain for life."

That is exactly what SoulSculpt Method is built around. Strength that respects your body's intelligence. Pilates that keeps you moving well enough to keep loading. And now, from September, the compound strength component that takes you straight to the science-backed sweet spot.

90 minutes a week. That's the answer. Now you have a programme built around it.

Come and experience the foundation before StrongSculpt launches.

StrongSculpt launches in September. The waitlist opens soon — and newsletter subscribers get first access.

Not on the newsletter yet? Send me an email directly at shaini@soulsculptmethod.com and I'll add you straight away.

Or keep reading:

• [Why I Combine Strength Training and Pilates After 40]

• [Why Women Lose Muscle After 40 — And Exactly How to Stop It]

  
  

With strength & softness, Shaini ♡

Shaini Verdon is the founder of SoulSculpt Method. E-RYT 500, Pilates instructor, NASM Women's Fitness Specialist, FRC Mobility Specialist. Based in Cantabria, northern Spain.