If you have hit your early-to-mid forties and noticed that your body suddenly feels like it is playing by different rules, you are not imagining it. Perimenopause, the transitional years leading up to your final period, can bring shifting energy, changes in body composition, disrupted sleep and a frustrating sense that what used to work no longer does. As strength and conditioning coaches, the question I hear most often in this stage is simple: does strength training actually help, or is it just another thing on the wellness to-do list?

The short answer is that the research is remarkably supportive. Resistance training is one of the few interventions with strong, consistent evidence across muscle, bone, metabolic and mental health outcomes during the menopause transition. Let's walk through what the studies actually say, rather than what the internet claims.

First, what is actually changing in perimenopause?

Perimenopause is driven by fluctuating and gradually declining oestrogen, and this has consequences that reach well beyond the reproductive system. Oestrogen influences how you build and retain muscle, how your bones remodel, how your body handles blood sugar, and even how you sleep and regulate mood. As levels become erratic, several changes tend to cluster together.

Muscle mass and strength start to decline more noticeably. Bone turnover accelerates, with the sharpest losses occurring in the year or two around the final period. Fat tends to redistribute toward the abdomen, and insulin sensitivity often dips. None of this means decline is inevitable or that you are powerless. It means the training you choose now matters more than it did in your twenties.

Muscle: protecting what quietly slips away

From roughly the age of 40, adults lose muscle mass and, more importantly, muscle strength and power each decade if they do nothing to counter it. The menopause transition appears to accelerate this, partly through the loss of oestrogen's protective effect on muscle. The good news is that resistance training directly opposes every one of these mechanisms.

Systematic reviews of progressive resistance training in midlife and postmenopausal women consistently show meaningful gains in lean mass, strength and functional capacity, even in women starting later in life. In practical terms, well-designed lifting programs reliably deliver:

• Increased or preserved lean muscle mass, which supports metabolism and independence

• Greater maximal strength, making everyday tasks feel easier

• Improved power, which is strongly linked to fall prevention as you age

• Better balance and coordination through loaded, controlled movement

Bone: the window you do not want to miss

This is arguably the most compelling reason to lift during perimenopause. The rapid drop in oestrogen accelerates bone loss, and the years surrounding the final period are when women lose bone density fastest. Left unaddressed, this sets the stage for osteopenia, osteoporosis and fracture risk decades later.

Bone responds to mechanical load. It is a living tissue that adapts to the forces placed on it, and resistance training plus high-impact and weight-bearing activity provides exactly the kind of stimulus that encourages bone to maintain or build density. The strongest evidence points to a few principles worth knowing:

• Heavier, progressive loading tends to be more effective for bone than light weights and high repetitions

• Multi-joint movements such as squats, deadlifts, presses and rows load the hips and spine, the sites that matter most

• Combining resistance training with impact work like jumping or hopping appears especially protective for bone

• Consistency over years matters more than any single perfect session

The landmark research here, including high-intensity resistance and impact training trials in postmenopausal women, has shown that appropriately supervised heavy lifting is both safe and effective for improving bone density, overturning the old fear that women in this stage should stick to light weights.

Metabolism, body composition and blood sugar

Many women notice weight creeping on around the midsection during perimenopause, even when their habits have not changed. Part of this is the hormonal shift in fat distribution, and part is the gradual loss of metabolically active muscle. Chasing this with more and more cardio is a common trap that often leaves people tired and no leaner.

Resistance training addresses the root of the issue. By building and preserving muscle, it supports resting metabolic rate and improves how your body manages glucose. Trials in perimenopausal and postmenopausal women show that strength training can improve insulin sensitivity, support healthier body composition and reduce visceral fat, particularly when paired with adequate protein intake. It is not about burning the most calories in a session; it is about changing the engine that runs all day.

Mood, sleep and the symptoms nobody warns you about

The menopause transition is strongly associated with disrupted sleep, low mood, anxiety and reduced quality of life for many women. Exercise is not a cure-all, and some symptoms genuinely warrant medical support, but the evidence for physical activity as a meaningful tool is solid. Regular resistance and combined training have been linked in reviews to improvements in mood, reduced depressive symptoms, better sleep quality and higher self-reported quality of life during this stage.

There is also a strong psychological dimension that research alone cannot fully capture. Getting demonstrably stronger, session after session, is a powerful antidote to the feeling that your body is working against you. That sense of capability and control is something clients describe again and again.

What effective training actually looks like

Translating the research into a weekly plan does not need to be complicated. Based on the evidence and what works in practice, a sensible starting framework for most women in perimenopause looks like this:

• Train with resistance two to three times per week on non-consecutive days

• Prioritise compound, multi-joint movements: squats, hinges, presses, pulls and carries

• Progress the load over time; challenging weights are what drive the muscle and bone adaptations you want

• Add some impact work such as skipping, hopping or low-level jumping if your joints allow and it is appropriate for you

• Support your training with sufficient protein, and keep some walking or low-intensity cardio for heart health

The most important variable is not the perfect program; it is doing something challenging and progressive that you can sustain for years. Technique and appropriate loading matter, which is exactly why coaching in this stage is so valuable.

Two myths worth putting to rest

The first is that women in perimenopause should train gently with light weights to avoid injury or bulking up. The research points the other way: challenging, progressive resistance is what protects muscle and bone, and women do not accumulate large amounts of muscle by accident. The second myth is that it is too late to start. Studies repeatedly show that women who begin strength training in their forties, fifties and beyond make substantial gains. The best time to start was years ago; the second best time is now.

The bottom line

Strength training will not stop perimenopause, and it is not a replacement for good medical care where that is needed. But the research is clear and consistent: progressive resistance training is one of the most effective, well-evidenced things you can do to protect your muscle, defend your bone density during a critical window, support your metabolism, and lift your mood and sleep. Few interventions do so much across so many outcomes at once.

If perimenopause has you rethinking how you train, this is the perfect moment to build a plan around your body and your goals with proper coaching and technique. Book a free 45-minute session at The Richmond Gym and let's map out a strength program that helps you feel capable and in control through this transition and well beyond it.