Cortisol, Menopause and Weight Gain: What Is Actually Happening

Most women I work with who are going through perimenopause are not doing nothing. They are training regularly. Some of them are training harder than they ever have. And it is not working: not for weight, not for energy, not for the belly that appeared with no obvious explanation. What I tell them, and what I wish someone had told me during my own perimenopause, is that the problem is usually not effort. The relationship between cortisol and menopause is the part of this picture that almost nobody explains properly.

Cortisol rises during menopause because of your hormones, not your circumstances

The Seattle Midlife Women's Health Study followed women across the menopausal transition and measured urinary cortisol at each stage. Nancy Woods and colleagues published their findings in 2009: cortisol rose from 42.7 ng/mg creatinine in the late reproductive stage to 53.4 ng/mg creatinine in the late menopausal transition. That is a 25% increase, and it happened independently of whether women reported feeling more stressed.

Most explanations of elevated cortisol in menopause frame it as a response to life pressure: demanding jobs, family responsibilities, not enough sleep. The research shows it is more structural than that. Declining oestrogen and progesterone directly affect the HPA axis, the body's central stress-regulation system, so the cortisol baseline rises as part of the hormonal transition itself.

Robert Sapolsky, the Stanford biologist whose book Why Zebras Don't Get Ulcers is the clearest plain-language account of stress biology, makes a distinction that matters here. A zebra experiences acute stress: a predator appears, the stress response fires, the danger passes, the body resets. Humans experience chronic, low-level activation where the system never quite returns to baseline. During perimenopause, the hormonal environment creates that same sustained activation, regardless of external circumstances.

The sleep disruption compounds it. A 2023 study from Harvard and Brigham and Women's Hospital found that sleep fragmentation raised bedtime cortisol by 27% and blunted the cortisol awakening response by 57% (Cohn, Joffe et al., PMC10584010). Disrupted sleep raises cortisol. Higher cortisol disrupts sleep further. Without directly addressing both sides, the loop does not resolve.

The fat storage problem in menopause is different because the hormonal environment is different

A 2022 review of multiple cohort studies found that visceral fat, the fat stored around the abdominal organs rather than beneath the skin, increases by approximately 8.2% per year in the two years around the final menstrual period (Greendale et al., PMC9258798). Premenopausally, visceral fat accounts for roughly 5 to 8% of total body fat. Postmenopausally, that figure rises to 15 to 20%.

Cortisol drives this directly. Visceral fat tissue is highly sensitive to cortisol, which preferentially promotes fat storage in the abdominal region. The mechanism is self-reinforcing: more visceral fat means more cortisol sensitivity, which means more fat stored in the same location. This is why abdominal fat in perimenopause resists approaches that worked before: it is not responding to the same inputs.

The metabolic shift compounds the problem. Lovejoy and colleagues found in 2008 that fat oxidation, the body's ability to use fat as fuel, fell by 32% postmenopausally compared to premenopausal controls (Lovejoy et al., Int J Obesity, PMC2748330). A woman working harder in a calorie deficit in this context is not producing the same physiological result she would have at 35. The machinery is different.

The exhaustion piece connects here too. Elevated cortisol disrupts sleep architecture and blunts the cortisol awakening response, which normally gives a clean spike of energy in the morning. Without that reset, women wake unrefreshed regardless of hours slept. This is not a psychology problem. It is a direct physiological consequence of an elevated cortisol baseline running through the night.

More training is often the wrong answer when cortisol is already elevated

This is the part that needs saying directly, because the standard advice is to exercise more.

Chronic steady-state cardio, the kind most women default to when they want to manage weight, raises cortisol acutely. At high frequency without adequate recovery, it keeps cortisol elevated. Dr Stacy Sims, whose 2022 book NEXT LEVEL addresses perimenopause training specifically, is unambiguous on this: the hormonal environment of perimenopause means long-duration moderate cardio produces a cortisol response without the adaptive benefit. The body registers it as additional load on a system that is already working hard.

There is also the fasted morning training problem. Many women train before breakfast, sometimes with caffeine, because that is when it fits. In a fasted state, cortisol is already at its daily peak. Adding caffeine raises it further. Sims recommends eating 15g of protein before training to blunt the cortisol spike: a small change with a measurable effect on how the session lands in the body.

According to Forth's 2026 UK stress survey, 17% of women aged 35 to 54 report feeling stressed every day. For a woman already operating at an elevated cortisol baseline, adding more high-intensity sessions is not a solution. It is more demand on a system that is already running above its useful range.

I changed my own training during perimenopause because of this. Not less training overall, but different training: fewer sessions, heavier load, longer recovery between sessions. The shift was not comfortable to make because it ran against everything I had believed about effort. But it was the thing that actually worked.

What I do with this information in practice, and what the evidence supports

The intervention that consistently shows benefit is heavy resistance training: two to three sessions per week at a load that produces genuine adaptation. This is not about burning calories. It is about providing the anabolic signal that counteracts the catabolic effect of elevated cortisol. The evidence for this in perimenopausal women is strong, and it is what Sims and the 2023 JISSN Position Stand both point to.

Pilates supports the other side of the equation. Controlled breath and progressive movement activate the parasympathetic nervous system, which is where cortisol regulation actually happens. This is not a gentle alternative to real training. It is a specific input, particularly useful for women whose cortisol baseline is elevated. At The Willow Studio, I use Pilates alongside the strength work at The Everstrong Gym because they address different parts of the same problem: one builds the anabolic signal, the other supports the recovery environment that allows it to work.

If you are training consistently and not seeing results, and you are in perimenopause or beyond, adding more sessions is rarely the answer. If you want to understand what your programme should actually look like given where your hormones are, personal training sessions at The Everstrong Gym in Ealing are where we build that properly.

Understanding the relationship between cortisol and menopause does not make the picture more depressing. It makes it more accurate. And accurate is the only starting point that actually leads somewhere.

Frequently Asked Questions

Does menopause cause high cortisol?

Yes, and the mechanism is hormonal rather than purely psychological. Research from the Seattle Midlife Women's Health Study found urinary cortisol rose by 25% across the menopausal transition independently of external stressors. Declining oestrogen and progesterone directly affect the HPA axis, raising the cortisol baseline as part of the hormonal transition itself (Woods et al., Menopause, 2009).

Does cardio make cortisol worse during perimenopause?

Chronic steady-state cardio at high frequency can keep cortisol elevated without adequate recovery benefit in women whose hormonal environment has already shifted. Dr Stacy Sims (NEXT LEVEL, 2022) recommends replacing long-duration cardio with heavy resistance training and short sprint intervals for women in perimenopause. This does not mean stopping all cardio. It means reconsidering volume, frequency, and recovery.

Is Pilates good for cortisol during menopause?

Pilates activates the parasympathetic nervous system through controlled breath and progressive movement. It provides physical challenge without the cortisol spike of high-intensity training. As part of a programme that also includes strength work, it supports the recovery side of the equation: which is where cortisol regulation actually happens.

Liz Shaw is a Master Personal Trainer, Comprehensive Pilates Instructor, Corrective Exercise Specialist, Nutritional Advisor, and Mental Health First Aider based in Ealing, West London. She runs The Willow Studio (Pilates) and The Everstrong Gym (strength training).

Sources

- Woods NF et al. "Cortisol levels during the menopausal transition and early postmenopause." Menopause, 2009. PMC2749064.

- Cohn TJ, Joffe H et al. "Sleep disturbance and the HPA axis in perimenopausal women." Brigham and Women's Hospital / Harvard. PMC10584010. 2023.

- Greendale GA et al. "Adiposity and body composition changes during the menopause transition." PMC9258798. 2022.

- Lovejoy JC et al. "Increased visceral fat and decreased energy expenditure during the menopausal transition." Int J Obesity. PMC2748330. 2008.

- Sims ST. NEXT LEVEL. Rodale Press. 2022.

- Sapolsky RM. Why Zebras Don't Get Ulcers. Henry Holt. 2004.

- Forth. UK Stress Statistics Report. 2026.