What is the Right Exercise for You at Your Life Stage?
Most of us settle into a way of exercising in our 20s or 30s and then just… keep doing it. The same run route. Same class. The same "cardio is cardio" mindset.
The problem is that your body's needs shift substantially every decade — and the exercise that served you brilliantly at 25 can quietly stop being enough (or even become the wrong priority) by 45 or 55. This isn't about doing more as you age. It's about doing the right things, in the right proportions, for the stage you're actually in.
The Baseline Everyone Should Know
Whatever your age, the NHS guidelines for adults are the same starting point:
- 150 minutes of moderate activity a week (or 75 minutes vigorous, or a mix), spread across 4–5 days
- Muscle-strengthening activity for all major muscle groups on at least 2 days a week — legs, hips, back, abdomen, chest, shoulders and arms
- Daily movement, and less time sitting still
That's the floor. What changes with age is which of these matters most right now, and what needs to be added on top.
What's Actually Changing in Your Body, Decade by Decade
A few things happen gradually, then all at once, as we age.
Muscle Mass Declines
Research suggests you lose roughly 3–5% of muscle per decade after age 30. That decline speeds up further after 60, unless you actively counter it.
Women face an extra, specific risk. The SWAN study tracked thousands of women through menopause for years. It found lean mass shifts from gaining about 0.2% a year before the transition to losing about 0.2% a year during it. That's a genuine reversal, not just "ageing as normal." It also happens alongside a doubling in the rate of fat gain over the same window.
This is a direction of change: muscle-building quietly becomes muscle-losing right around menopause. That's exactly why this window is the highest-leverage moment to add resistance training — not because muscle is about to collapse overnight, but because the trend just switched against you and you have an opportunity to stall it.
GLP-1 Medications and Muscle Loss
GLP-1 weight-loss medications (Ozempic, Wegovy, Mounjaro, Zepbound) add another layer worth knowing about. Research so far suggests a meaningful chunk of the weight lost on these drugs is muscle, not fat. Evidence puts it at roughly 20–50% of total weight lost, compared with around 20–25% for typical calorie-restriction-only weight loss.
A December 2025 review of the global academic evidence put this starkly. Academic Dr Gillian Hatfield led it, in partnership with Les Mills and ukactive. It states: "the magnitude of lean body mass loss can be similar to that resulting from bariatric surgery, cancer treatment, or 10 years of ageing."
That figure needs a caveat before you repeat it, though. It's a comparison from an evidence review, not a single controlled study with a stated timeframe — it doesn't specify "per year" versus "over a typical 12–18 month course." It also isn't uncontested: a separate meta-analysis of 36 studies found muscle loss to be comparatively "modest" once you account for the overall amount of weight lost.
Both sides agree on the practical takeaway however. This is exactly why doctors now routinely recommend resistance training and higher protein intake alongside these medications, not instead of them.
Aerobic Fitness (VO2 Max) Declines
VO2 max typically drops around 5–10% per decade after early adulthood. This decline is far from fixed, though: studies of lifelong endurance athletes show losses roughly half those seen in sedentary adults. A good chunk of the "inevitable" decline is really a decline in training, not just age.
This one matters more than people realise. Cardiorespiratory fitness is one of the strongest predictors of how long you live, full stop. A 2022 study followed over 750,000 adults and found each 1-MET increase in fitness cut the risk of death by 13–15%, regardless of age, sex or other health conditions. Being unfit carried up to a 5x higher mortality risk than being highly fit — a bigger gap than smoking creates.
How you build fitness matters, not just whether you do it. Exercise physiologist Dr Stacy Sims researches women's exercise physiology through perimenopause and menopause. She recommends prioritising short, very hard efforts — sprint intervals of around 10–30 seconds at all-out effort with 2-3 minutes of recovery — over relying purely on steady, moderate-intensity cardio such as a typical spin class for example. Hormonal shifts around menopause reduce metabolic flexibility, and short, hard efforts do more to maintain fat-burning capacity and muscle.
The underlying exercise science backs this up. The classic "Norwegian 4x4" protocol uses four 4-minute intervals at 90–95% max heart rate, with 3 minutes' easy recovery between each (please note this was a male only study). In a controlled trial, it improved VO2 max by 7.2% in 8 weeks. Continuous moderate-intensity training at the same total workload produced no significant improvement at all.
The practical version: a couple of short, genuinely hard interval sessions most weeks will likely do more for your fitness — and your lifespan — than the same time spent at a comfortable, steady pace.
Bone Density Drops Sharply Around Menopause
Women can lose up to 20% of bone density across the menopause transition and the years that follow. The scale of this deserves stating plainly: in the UK, half of all women over 50 will break a bone because of osteoporosis.
Hip fractures specifically are a serious health event, not just an inconvenience. Research puts mortality in the year following a hip fracture at 20–24%. Among survivors, around 40% can't walk unaided a year later, and roughly a third end up fully dependent on others or in long-term care.
None of this has to happen, though. Bone responds to load — which is exactly why resistance and impact-based training earns its place on this list, rather than being a "nice to have."
Balance and Fall Risk
Balance and fall risk become a genuine consideration from your 60s onward — well before most people think to train for it.
None of this is set in stone. The right training slows it down, or reverses it. But it does mean the right exercise looks different at different ages.
"But I Do Yoga/I Run — Surely That's Already Sorted?"
I hear a version of this a lot: someone's been told they have osteopenia (the precursor to osteoporosis), but they're not worried, because they do yoga, or they run, so it's probably reversing itself. It's a completely understandable assumption — and worth addressing directly, because the evidence doesn't really back it up, and believing it can mean missing a real opportunity to protect your bones.
Bone responds to mechanical strain specifically — the amount and type of load actually going through it — not to movement in general. A systematic review and meta-analysis of yoga and Pilates for bone density in women found no significant improvement from yoga compared with a control group; Pilates fared marginally better, but the overall evidence for both was rated weak, based on small, short trials. None of that means yoga isn't worth doing — it's genuinely good for balance, flexibility and stress — it just hasn't been shown to meaningfully build bone, so isn't enough on it's own.
Running is a bit more complicated. It is weight-bearing, which is generally better for bone than sedentary activity. But the impact is not heavy enough (see instagram post below). But several studies have found female endurance runners with lower bone density than expected — sometimes lower than non-runners — particularly at the lumbar spine, a site running doesn't load especially well, and particularly among runners with irregular periods or inadequate fuelling relative to their training (a pattern known as RED-S, relative energy deficiency in sport). So "I run" doesn't automatically mean bone health is covered — especially at higher training volumes, or if eating isn't keeping pace with training.
What Actually Works: Resistance and Impact Training
The evidence points clearly to heavy, progressive resistance training combined with impact loading. The clearest example is the LIFTMOR trial. Researchers put postmenopausal women with low bone mass through an 8-month, supervised programme of heavy deadlifts, squats, overhead presses and jumping. It produced around 4% better bone density at the spine and 2% better at the hip than a control group — a genuinely meaningful result — and the researchers found the training safe under proper screening and supervision.
That's also a useful reality check on scale. A dedicated, well-designed programme achieved a few percent improvement over eight months. That's real progress — not an overnight reversal back to "normal" bone density, and not something a general yoga or running routine is likely to match on its own.
The honest takeaway: if you've been told you have osteopenia, check whether your current exercise actually includes proper resistance and impact loading, rather than assuming whatever you're already doing has it covered.
This post from Dr Jocelyn Wittstein explains brilliantly why running alone isn't optimal if you need to improve your bone density.
Exercise by Stage of Life
Stage | What's happening | Where to focus |
20s–30s | Peak bone mass is being set (largely locked in by your early 30s). Muscle and fitness are easiest to build now | Build the habit: resistance training 2–3x/week, a cardio base, and mobility work. Think of this as paying into a bone and muscle "savings account" you'll draw on for the rest of your life |
40s (often perimenopause) | Muscle loss and aerobic decline quietly begin accelerating, often before any obvious symptoms | Don't let steady-state cardio crowd out strength work. Resistance training 2–3x/week becomes non-negotiable, alongside adequate protein |
50s–60s (menopause & beyond) | Oestrogen decline accelerates muscle loss, bone loss and visceral fat storage; recovery slows | This is the highest-leverage window for resistance training and protein intake. It's also the point to introduce balance work — don't wait until your 60s to start, since NHS guidance for over-65s already includes it |
65+ | Falls become a real risk; strength and balance directly affect independence | NHS guidance explicitly adds strength, balance and flexibility work at least 2x/week — yoga, tai chi, resistance bands and bodyweight work all count |
Why Mobility Deserves Its Own Focus (Not Just "Stretching")
Mobility vs. Flexibility
Mobility tends to get lumped in with stretching and treated as optional — the thing you skip when you're short on time. It's worth separating the two. Flexibility is the passive range of motion available in a joint, while mobility is whether you can actually control and use that range in real life: reaching a top shelf, getting up off the floor, turning to check your blind spot, catching your balance without a joint giving way. Mobility, not flexibility on its own, actually protects you day to day.
The Floor Test That Predicts How Long You Live
There's a striking illustration of why this matters. Researchers studied over 2,000 adults on something deceptively simple: sitting down on the floor and standing back up again, without using your hands, knees, or nearby furniture for support. The results tracked how long people lived. People who scored lowest had a 5–6 times higher risk of death over the following six years than those who scored highest, and each point of improvement in the score cut mortality risk by 21%.
Nobody thinks the floor test itself keeps people alive. It's a proxy for the strength, balance and mobility that do.
Mobility and Menopause
Mobility also has a menopause-specific chapter of its own. Doctors now recognise joint aches, stiffness and reduced range of motion as a genuine cluster of menopause symptoms, sometimes called "the musculoskeletal syndrome of menopause". It affects up to 70% of women during the transition, and around 1 in 4 experience it severely enough to disrupt daily life.
The mechanism ties back to oestrogen's role in collagen and connective tissue. As oestrogen declines, joints and tendons lose some of their usual lubrication and elasticity. That's also part of why conditions like frozen shoulder spike sharply in the perimenopausal years.
None of that means resigning yourself to stiffness, though. Mobility responds to consistent, deliberate use the same way muscle and bone do. That's exactly why NHS guidance for adults 65+ explicitly adds flexibility work alongside strength and balance (see the table above). There's a good case for building the habit decades before it's mandated by the guidelines, not after.
The Most Common Mistake
The most common pattern I see is women reaching their 40s and 50s still training the way they did at 25 — lots of cardio, little to no resistance training, and not enough protein to support the muscle they still have. It's completely understandable; it's what worked before, and cardio feels productive.
But by the time muscle loss and bone loss are accelerating, cardio alone isn't the tool that protects you most. Strength training — done consistently, with enough protein to back it up — is.
The Take-Home
You don't need a completely different approach every year. But it's worth checking, every decade or so, that your training still matches what your body actually needs right now — not what it needed ten years ago.
Want This Built Into a Proper Programme?
Knowing what your body needs at this stage is one thing. Having a programme, and coaching, built specifically around it is another. If you're navigating perimenopause, menopause or beyond and want training that actually accounts for everything above — resistance work, bone loading, mobility, the lot — that's exactly what my Holding Back the Years programme delivers. So come and join me 🙂
This article is for general information and isn't a substitute for personalised advice. If you're returning to exercise after a break, are pregnant, or have an existing health condition, it's worth checking with your GP first.
