What Happens to Sleep and Exercise Tolerance in Perimenopause?

Why does sleep fall apart, and workouts feel harder, around the time your periods start to change? Here is what research says about perimenopause, sleep and exercise, and where the evidence is mixed.

In this article

1. What is perimenopause, and when does it start?
2. How can perimenopause change your sleep?
3. Does exercise help menopausal symptoms?
4. Why can exercise feel harder during perimenopause?
5. Is strength training still worth it?
6. How can you track sleep and symptoms for a clinician?
7. What could an 8-week activity plan look like?
8. When should you talk to a clinician?
9. Frequently asked questions
10. Final thoughts
11. Sources and further reading

What is perimenopause, and when does it start?

Perimenopause is the stretch of time when periods start to change and symptoms can appear, before periods stop altogether. The NHS says it usually affects women between 45 and 55, though it can happen earlier, and it affects anyone who has periods.

The NHS describes menopause and perimenopause as "a natural part of life" that happens "when your periods change and eventually stop due to lower hormone levels." It adds that menopause is when you have not had a period for 12 months, and that one of the first signs of perimenopause is usually a change to your periods.

How can perimenopause change your sleep?

Perimenopause can make sleep lighter and more broken for many people, especially through hot flushes, night sweats and waking in the night. Large studies link the menopause transition with more sleep complaints, although not everyone is affected, and age and other life factors also play a part.

Waking in the small hours is common, and the causes are covered in why you wake up at 3 am.

What the reviews report

The 2018 review in Sleep Medicine Clinics by Baker, Lampio, Saaresranta and Polo-Kantola describes an increase in insomnia symptoms in the menopausal transition, particularly difficulty staying asleep. The authors identify vasomotor symptoms (hot flushes and night sweats) as a key component of sleep disruption. They also note that studies using overnight sleep recordings are less consistent in showing disrupted sleep that is independent of ageing, and that more prospective research is needed.

The review also covers sleep-disordered breathing, such as sleep apnoea. Snoring or gasping at night are worth raising with a clinician rather than putting down to hormones.

What a large cohort adds

The Study of Women's Health Across the Nation (SWAN) followed women through midlife. A 2011 summary by Kravitz and Joffe reports that sleep difficulties were most common in late perimenopause, with prevalence of 39 to 47 percent compared with 16 to 42 percent before menopause. Hot flushes and night sweats strongly predicted sleep disruption. These are self-reported, observational findings, so they show association, not cause.

Does exercise help menopausal symptoms?

Exercise has not been proven to relieve hot flushes and night sweats, but it may help some people sleep better. The evidence is mixed: a Cochrane review found it insufficient for vasomotor symptoms, while a later meta-analysis found lower insomnia severity in menopausal women who exercised.

The Cochrane review by Daley and colleagues, last updated in 2014, concluded: "Evidence was insufficient to show whether exercise is an effective treatment for vasomotor menopausal symptoms."

Exercise and sleep

A 2023 systematic review and meta-analysis in Frontiers in Medicine (Qian and colleagues) included 17 randomised trials, 10 of which supplied data for the analysis. Exercise was linked with lower insomnia severity, with a moderate effect size. Overall sleep quality scores on the Pittsburgh Sleep Quality Index did not improve significantly. The authors reported high heterogeneity, signs of publication bias for the insomnia result, and heavy reliance on self-reported sleep, so exercise may help some people sleep but the research cannot promise it.

Why can exercise feel harder during perimenopause?

Exercise can feel harder during perimenopause for reasons that often overlap: broken sleep, tiredness, low mood and aching muscles and joints. The NHS lists all of these among possible symptoms, though no source cited here proves that they directly reduce fitness.

The NHS says not being able to get to sleep or stay asleep can affect daily life, and that mood symptoms such as low mood or depression may feel worse if you have sleep problems and feel very tired. It also lists muscle aches and joint pains among other symptoms.

The research reviewed here does not measure exercise tolerance directly, so the link is an inference.

How hard you train on a tired day is a separate question, explored in how much strength training you need each week.

Is strength training still worth it?

Strength training is still worth doing during and after perimenopause. The NHS advises regular exercise with a focus on weight-bearing and strength exercises to build strength and help protect against weakening bones, using activities such as walking, running, dancing and resistance exercises.

Questions about treatments for symptoms or bone health are a conversation to have with a doctor, and the NHS says contacting a GP is the way to find out what your options are. This article does not compare treatments.

How can you track sleep and symptoms for a clinician?

A simple sleep and symptom diary lets you record night waking, hot flushes, mood, energy and period changes over several weeks. Written notes help a clinician see patterns that are hard to recall in an appointment, and the NHS says early advice can help reduce the effects on health, relationships and work.

A diary records your experience and cannot show which stage of the transition you are in. Heart rate variability is another trend some people track, explained in what HRV is and why it matters.

Add a line for your period: the date it started, whether bleeding was lighter or heavier than usual, and any gaps. The NHS lists a change in your bleeding pattern among the things worth mentioning to a GP.

What could an 8-week activity plan look like?

A general 8-week plan builds gently from walking and basic strength work toward more regular activity, with easier days when sleep is poor. It is a sample structure, not a prescription, and anyone with a health condition should check with a clinician first.

The amounts below are an illustrative guide only, so adjust them for your fitness, joints and energy.

When should you talk to a clinician?

Talk to a GP or other clinician if symptoms affect daily life, if you want to understand your options, or if your bleeding changes in the ways the NHS lists. Treatments exist, and discussing them is a conversation to have with a professional, not something to decide from an article.

The NHS advises contacting a GP if:

• you think you have symptoms of menopause or perimenopause and want to know what your options are
• you have symptoms like a fast heartbeat (palpitations)
• you still have periods but your bleeding pattern has changed and you are bleeding more, not less, than before
• you have not had a period for 12 months or more, and you have any vaginal bleeding

The NHS says any bleeding after more than 12 months without a period needs to be checked, even if it is only a small amount. Please also seek advice for loud snoring or gasping at night.

If you need contraception, the NHS advises talking to a doctor about it.

Frequently asked questions

At what age does perimenopause start?

The NHS says menopause and perimenopause usually affect women between 45 and 55, but they can happen earlier. Anyone who has periods can be affected. If you think you are experiencing symptoms much earlier than that, speak to a GP to find out what is going on.

Why am I waking up at night during perimenopause?

Night waking is the most commonly reported sleep complaint in the menopause transition, and hot flushes and night sweats are a key factor, according to Baker and colleagues. Other causes can also play a part, so mention it to a clinician.

Does exercise reduce hot flushes?

Not reliably, as far as the evidence shows. A 2014 Cochrane review found the evidence insufficient to say whether exercise is an effective treatment for vasomotor symptoms. Some people still find activity helps how they feel overall, and it supports bones and muscles.

Can exercise help me sleep during perimenopause?

It might. A 2023 meta-analysis of 17 trials in menopausal women found lower insomnia severity with exercise, though overall sleep quality scores did not improve significantly and the studies varied widely. Treat exercise as one reasonable habit to try rather than a guaranteed fix.

Should I do strength training or cardio?

Both have a place. The NHS advises regular exercise with a focus on weight-bearing and strength activities to help protect bones, such as walking, running, dancing and resistance exercises. Choose a mix you enjoy and can keep up, and ask a clinician if you have joint problems or osteoporosis.

Is it normal to feel more tired when I work out in perimenopause?

Feeling more tired is common, because the NHS lists sleep problems, low mood and muscle and joint aches among possible symptoms. Persistent exhaustion, palpitations or breathlessness deserve a check by a clinician, since other causes are possible. On rough days, an easier session is reasonable.

Final thoughts

Here is the short recap.

• Perimenopause usually begins between 45 and 55, and research links it with more broken sleep, especially alongside hot flushes and night sweats.
• Evidence that exercise relieves hot flushes is insufficient, and evidence for sleep is promising but mixed, yet strength and weight-bearing activity still supports bones and muscles.
• A sleep and symptom diary, plus a talk with a clinician about your options and any bleeding changes, is a sensible next step.

Your turn: Have your sleep or workouts changed in your 40s or 50s, and what has helped you keep moving? Tell us in the comments.

Sources and further reading

1. NHS. Menopause and perimenopause. nhs.uk, accessed 2026.
2. NHS. Menopause symptoms. nhs.uk, accessed 2026.
3. NHS. Things you can do to help menopause and perimenopause symptoms. nhs.uk, accessed 2026.
4. Baker FC, Lampio L, Saaresranta T, Polo-Kantola P. Sleep and sleep disorders in the menopausal transition. Sleep Medicine Clinics, 2018.
5. Kravitz HM, Joffe H. Sleep during the perimenopause: a SWAN story. Obstetrics and Gynecology Clinics of North America, 2011.
6. Daley A, Stokes-Lampard H, Thomas A, MacArthur C. Exercise for vasomotor menopausal symptoms (Europe PMC record, PMID 25431132). Cochrane Database of Systematic Reviews, 2014.
7. Qian J and colleagues. The effect of exercise intervention on improving sleep in menopausal women: a systematic review and meta-analysis. Frontiers in Medicine, 2023.