# Your hormones are changing. Your training should too.

> Perimenopause is the years of erratic hormones before your final period. Muscle, bone, sleep and insulin sensitivity all start to slip. Lift heavy, add short sprints, eat more protein, fuel your training, protect your sleep, and take your symptoms to a doctor who knows the options, hormone therapy included.

- URL: https://www.plansforyourbody.com/plans/navigate-perimenopause/
- Categories: Hormones, sleep & ageing
- Updated: 2026-10-06
- Not medical advice: Discuss everything here with a medical doctor before acting on it — supplements included. Your doctor has your bloodwork and history. We have neither.

## The goal

Most women hit their 40s, start sleeping badly, notice their periods doing odd things and their waistband tightening, and get told it’s stress, or age, or “just hormones”. It is hormones. That doesn’t mean nothing can be done. This plan tracks what’s changing, adjusts training and food for a body that now responds differently, and tells you when the right move is a doctor’s appointment.

- **Track:** Cycle dates · symptoms · sleep · a baseline of lipids, HbA1c and strength
- **Change:** Heavy lifting · short sprints · jumping · more protein · fuel your training
- **Escalate:** Bothersome symptoms, odd bleeding or low mood: a doctor who knows menopause

## Why it matters: The transition is where the damage starts.

- **The default:** Keep doing the long, moderate cardio and the light weights that worked at 35. Eat a little less to stop the weight gain. Sleep worse, recover worse, lose muscle you can’t see yet. Hot flashes for a median of 7.4 years in the biggest US study, and no one mentions it.
- **The better bet:** Muscle loss, bone loss, rising LDL and visceral fat all accelerate during the transition, not after it. That makes these years the window to act. Dr. Stacy Sims’s point is blunt: women aren’t small men, and midlife women aren’t 30-year-old women. Train and eat for the body you have now.

## How it works: Estrogen doesn’t fade. It swings.

Perimenopause isn’t a slow decline. Dr. Nanette Santoro, who has spent decades measuring hormones across the transition, makes the point that the early years aren’t simply estrogen loss. Ovarian function becomes erratic: some cycles flood you with estrogen, others barely ovulate, and progesterone drops early. Estrogen does far more than run your cycle. It helps muscle respond to training, keeps bone turnover in check, and helps your body handle glucose. As it becomes unreliable, all three suffer.

- **The stages:** The STRAW+10 staging system: the early transition starts when your cycle length varies by seven days or more, persistently. The late transition starts with a gap of 60 days or more between periods. Menopause is the final period, confirmed after 12 months without one. The average age in Canada is around 51.
- **Muscle:** Estrogen helps muscle repair and grow. As it drops, the same training gives you less. In a Finnish cohort followed from perimenopause into early postmenopause, women lost lean and muscle mass; the more physically active women lost less.
- **Bone:** Bone loss speeds up in the late transition and the first years after the final period. The load you put through your skeleton is the signal it uses to stay dense.
- **Insulin and fat:** Insulin sensitivity falls, fat shifts from hips to belly, and LDL and ApoB rise. The American Heart Association calls the transition a window of rising heart risk.
- **Hot flashes and sleep:** Swinging estrogen unsettles the brain’s thermostat. Night sweats wake you; poor sleep then makes appetite, mood and blood sugar worse. Sleep becomes part of the problem and part of the fix.
- **Mood and brain:** Anxiety, low mood, irritability and brain fog are common in the transition, including in women with no history of them. They’re real symptoms, not character flaws, and they’re treatable.

## The steps: Track. Train for the body you have now. Escalate early.


### Track (Start now): Write it down before anyone tells you it’s nothing.

- **Cycle and symptom log** (every day, 3 months): First day of each period, flow, hot flashes, night sweats, sleep, mood, joint pain. An app or a notebook. Three months of data gets you further in a 10-minute appointment than a vague description.
- **No hormone tests needed, usually** (over 45): Hormone levels swing day to day in perimenopause, so a single FSH or estrogen test tells you little. Santoro’s research is why: the same woman can test high one week and low the next. UK (NICE) guidance diagnoses it from symptoms and cycle pattern over 45. Under 40, or 40–45 with symptoms, testing does make sense; ask your doctor.
- **Baseline bloodwork** (ask your doctor): Lipid panel with ApoB, HbA1c, and thyroid if you’re tired or your cycles are odd. Iron if your periods are heavy. These are the numbers that move in the transition.
- **Fasting insulin and glucose** (morning, after an overnight fast): Together they give HOMA-IR, a simple insulin-resistance score. Fasting insulin often isn’t covered in Canada. It’s cheap to pay for.
- **Strength baseline** (write the numbers down): Your best squat, deadlift or leg press for 5 reps, a timed plank, grip strength if you can test it. You’re about to defend these numbers.

### Train (3–4 days a week): Heavier, shorter, sharper.

Sims’s summary of the research: midlife women get the most from heavy lifting, short all-out sprints and jumping, and less from long, moderate cardio. Strength is non-negotiable; the long runs are optional.

- **Heavy lifting** (2–3×/week, 3–6 reps): Squats, deadlifts, presses, rows, lunges. Work to sets you couldn’t repeat more than once or twice. Light weights for high reps don’t send the same signal to muscle or bone. Learn the lifts with a coach if you’re new.
- **Sprint intervals** (1–2×/week, under 20 minutes): After a warm-up, 20–30 seconds hard on a bike, rower or hill, then full recovery. Repeat 4–8 times. Short, hard work improves insulin sensitivity and fitness without the recovery cost of long sessions.
- **Jumping** (a few minutes, 3×/week): Jump squats, skipping, step-ups with a hop. Impact loads bone in a way cycling and swimming don’t. Skip it if you have pelvic floor symptoms until a pelvic health physiotherapist clears you.
- **Walking** (daily): The base everything else sits on. It costs almost nothing to recover from.
- **Recovery** (48 hours between hard sessions): You recover slower than you did. Two hard days in a row are often one too many. Fewer, harder sessions beat more, tired ones.

### Fuel (every day): Eat to train. Don’t diet to shrink.

This is where the plan departs from simple fasting advice. Sims argues active women in the transition do worse with fasted hard training and aggressive restriction. Haver’s plan uses a daily eating window. They agree on more protein and fewer refined carbs.

- **Protein** (about 1.6 g/kg body weight a day): In pooled trials of people lifting weights, muscle gains plateaued at about 1.6 g of protein per kg of body weight a day. Spread it across meals, with a solid serving after training. Most women eat well short of it.
- **Fuel hard sessions** (don’t sprint or lift fasted): Have some protein and carbohydrate before hard training if you train in the morning, and protein soon after. Save any fasting for rest days.
- **Real food** (protein first): Build meals on protein, vegetables and natural fats: fish, meat, eggs, dairy, legumes, nuts. Protein and fibre keep you full and flatten glucose spikes.
- **Sugar and refined carbs** (cut hard): Sugar, sweet drinks, juice, white flour and most packaged snacks. The fastest lever on insulin, blood sugar and triglycerides. Insulin sensitivity is falling. Fewer spikes means less fat finding its way to your belly.
- **Eating window** (daily, e.g. noon to 8 pm): Eat inside a fixed window and not outside it. Fewer insulin spikes per day, fewer chances to overeat. Keep it moderate, e.g. 10 hours, and build it around your training, not against it.
- **Alcohol** (fewer drinks, fewer hot flashes for many): It goes straight to the liver, raises triglycerides and adds to liver fat. Less is better; none is best while you’re fixing the numbers. It also wrecks sleep in the second half of the night, which is when night sweats hit.

**On longer fasts:** Extended fasting during the transition is contested (see below). If you try it, do it on a rest day, never before hard training, and stop if your cycle, sleep or mood gets worse. Talk to your doctor first.

### Sleep (every night): Protect the night. It runs everything else.

- **Sleep** (7+ hours): One short night measurably worsens insulin sensitivity, blood sugar and appetite the next day. The cheapest part of the protocol, and the most skipped. In perimenopause, short sleep also makes hot flashes feel worse and cravings stronger.
- **Cool room, layers** (around 18 °C): A cool bedroom and layers you can throw off. It won’t stop hot flashes, but it helps you get back to sleep faster after one.
- **CBT for insomnia** (first-line for poor sleep): Cognitive behavioural therapy works for menopausal insomnia, and the Menopause Society also recommends it for how bothersome hot flashes are. Ask your doctor for a referral or a digital program.

### Escalate (when symptoms get in the way): You don’t have to tough it out.

- **Hormone therapy** (talk to your doctor): The Menopause Society’s 2022 position statement calls it the most effective treatment for hot flashes and night sweats, and says it prevents bone loss. For women under 60 or within 10 years of menopause without contraindications, it judges the benefits to outweigh the risks. Whether it’s right for you is a conversation with your doctor.
- **Non-hormone options** (talk to your doctor): If hormones aren’t right for you, there are prescription options with good evidence for hot flashes. Ask your doctor what fits.
- **One treatment, several symptoms** (ask about it): Santoro’s practical advice to clinicians: map the symptoms to the stage you’re in, and where possible pick one treatment that covers several of them, rather than a separate pill for each. Bring your symptom log so your doctor can see the whole picture.
- **See a doctor soon if** (don’t wait): Very heavy bleeding, bleeding between periods or after sex, periods much closer together than usual, any bleeding after 12 months without a period, symptoms before age 40, or low mood or anxiety that’s affecting your life.
- **Contraception** (still needed): You can still get pregnant in perimenopause. Ask your doctor how long you need contraception for your age.
- **Find the right doctor** (it matters): Many doctors have had little training in menopause. If you’re brushed off, ask for a referral or look for a clinician with menopause certification.

## The rules: Short list. No exceptions.

**Choose:**
- Heavy weights, 2–3 times a week
- Short sprints instead of more long, moderate cardio
- Protein at every meal, and after every session
- A cool, dark bedroom and a fixed wake time

**Avoid:**
- Light weights for endless reps as your only strength work
- Hard training on an empty stomach
- Crash diets: they take muscle and bone with the fat
- Alcohol as a sleep aid

**Non-negotiables:**
- Lift heavy. Nothing else on this page does what it does for muscle and bone.
- Track your cycle and symptoms. Data beats “I don’t feel right.”
- See a doctor for any bleeding after 12 months without a period.
- Talk to a medical doctor before you fast or start a supplement.

## Checkpoints: What to track, and what good looks like.

The point isn’t to stop the transition. It’s to arrive on the other side with your strength, bone and metabolism intact.

| What | Target | How and when |
|---|---|---|
| Strength | Holding or rising | Retest your 5-rep lifts every 8–12 weeks. Falling strength is the earliest sign the plan isn’t working. |
| Waist | Under 88 cm (35 in), and not growing | Tape at the navel, monthly. Fat moving to the belly shows here before it shows on the scale. |
| Sleep | 7+ hours, waking rested most days | Your log. If night sweats wake you most nights, that’s a doctor’s appointment. |
| Symptom log | Fewer, milder, or manageable | Compare month to month. Bring it to every appointment. |
| ApoB / LDL | ApoB <0.9 g/L (90 mg/dL) for most | Yearly. LDL and ApoB tend to rise across the transition. |
| HbA1c | <5.7%, and stable | Yearly. Diabetes Canada flags 6.0–6.4% as prediabetes. |
| HOMA-IR | Under ~1.0 is ideal; over ~2.5 suggests insulin resistance | Fasting glucose (mmol/L) × fasting insulin (µU/mL) ÷ 22.5. |

A single hormone test is a snapshot of a moving target. Track symptoms and outcomes instead.

## Where experts disagree: Where the experts don’t agree.

Nobody serious argues against lifting and protein in midlife. The fights are about fasting, cardio, and how readily to reach for hormones.

### Should women fast in perimenopause?

- **Cautious: Stacy Sims:** Much of the fasting research was done in men or in sedentary people. Active women in the transition already run high on stress hormones; fasted hard training and long fasts can add to that and cost muscle.
- **In favour: Mary Claire Haver:** Haver’s Galveston Diet uses a daily 16:8 eating window. The case for it: falling insulin sensitivity is exactly what the transition brings, and a shorter eating day is one way to work on it.

**Our read:** A moderate daily window is low-risk for most. Don’t train hard fasted, and keep longer fasts off training days. If your sleep, cycle or mood gets worse, drop it.

### Is long, moderate cardio a waste of time?

- **Short and hard: Stacy Sims:** Sprint intervals and heavy lifting give midlife women a stronger signal for muscle, bone and insulin sensitivity than long, moderate sessions, with less stress to recover from.
- **Canadian 24-Hour Movement Guidelines (CSEP):** Aim for 150 minutes a week of moderate-to-vigorous activity, plus strength work twice a week. Moderate minutes count, and most of the evidence on living longer comes from them.

**Our read:** Keep walking every day. Swap some of the long, moderate sessions for sprints and lifting, not all of your movement.

### How readily should hormone therapy be offered?

- **Offer it: Mary Claire Haver, the Menopause Society:** For women under 60 or within 10 years of menopause without contraindications, it’s the most effective treatment for hot flashes and prevents bone loss. The fear of it comes largely from an older study in older women.
- **More cautious: USPSTF:** The US Preventive Services Task Force recommends against hormone therapy to prevent chronic disease in women without symptoms. Its recommendation doesn’t cover treating symptoms.

**Our read:** These aren’t really in conflict. For bothersome symptoms, it’s a legitimate option to raise with your doctor. As a general anti-ageing tool, the evidence isn’t there.


## Limits: What this plan can’t fix.

- **Hot flashes:** Training, diet and yoga don’t reliably stop hot flashes. The Menopause Society’s 2023 review doesn’t recommend exercise or dietary changes for them. Weight loss helps some women. For the rest, the effective treatments are prescriptions. That’s your doctor’s department.
- **Bleeding and mood:** Abnormal bleeding needs investigating, not a training plan. Depression and anxiety in the transition are common and treatable; they need a clinician, not more willpower.
- **The transition itself:** Nothing here stops perimenopause or changes when it ends. It changes what condition you’re in when you get there.

*The plan protects muscle, bone and metabolism. The hormones are a medical conversation.*

## Resources

- Next Level — Stacy T. Sims, PhD, with Selene Yeager. Training and nutrition for women going through menopause: heavy lifting, sprints, jumping and protein, with sample programs.
- ROAR — Stacy T. Sims, PhD, with Selene Yeager. The earlier book on female physiology and training. Useful if you’re still cycling.
- The New Menopause — Mary Claire Haver, MD. An OB-GYN’s guide to the symptoms of perimenopause and menopause and the treatment options, hormonal and not.
- [Perimenopause: From Research to Practice](https://pmc.ncbi.nlm.nih.gov/articles/PMC4834516/) — Nanette Santoro, MD, Journal of Women’s Health (2016). A free review linking each stage of the transition to the symptoms it brings, and why hormone tests mislead. Written for doctors, readable for anyone.
- [The 2022 hormone therapy position statement](https://pubmed.ncbi.nlm.nih.gov/35797481/) — The Menopause Society. What the evidence says about benefits and risks, by age and time since menopause.
- [Guideline No. 422a: Menopause](https://sogc.org/common/Uploaded%20files/CME-ON/gui422aCPG2110E.pdf) — Society of Obstetricians and Gynaecologists of Canada. What your Canadian doctor is working from for hot flashes, therapies and lifestyle.

## Questions

### How do I know I’m in perimenopause?

Usually from your cycle: if its length starts varying by seven days or more, persistently, you’re likely in the early transition. Gaps of 60 days or more mean the late transition. Over 45, guidance says symptoms and cycle pattern are enough; under 45, ask your doctor about testing.

### How long does perimenopause last?

It varies, often several years. In the largest US study, hot flashes and night sweats lasted a median of 7.4 years in women who had them frequently, and longer in women whose symptoms started early.

### Why am I gaining weight when nothing has changed?

Something has: estrogen is swinging, insulin sensitivity is falling, and fat is shifting to your belly while muscle shrinks. Eating less alone tends to cost more muscle. Lifting and protein protect it.

### Should I stop running?

No, if you enjoy it. But don’t let it replace heavy lifting, and think about swapping some steady runs for short sprint intervals.

### Is hormone therapy safe?

For women under 60 or within 10 years of menopause without contraindications, the Menopause Society judges the benefits to outweigh the risks for treating symptoms and preventing bone loss. Your own history decides it. Talk to your doctor.

### Can I still get pregnant?

Yes. Ovulation becomes irregular, not absent. Ask your doctor how long you need contraception.


## Sources

- Stacy Sims, PhD — Exercise physiologist and nutrition scientist. Research on female athletes and midlife women; author of ROAR and Next Level.
- Mary Claire Haver, MD — OB-GYN, certified menopause provider. Author of The New Menopause and The Galveston Diet.
- Nanette Santoro, MD — Reproductive endocrinologist, University of Colorado School of Medicine. Long-time SWAN investigator; research on the hormones of the menopause transition.
- Samar El Khoudary, PhD — Epidemiologist, University of Pittsburgh. Lead author of the AHA statement on the menopause transition and heart risk.

1. [The 2022 hormone therapy position statement of The North American Menopause Society](https://pubmed.ncbi.nlm.nih.gov/35797481/). Menopause, 2022.
2. [The 2023 nonhormone therapy position statement of The North American Menopause Society](https://pubmed.ncbi.nlm.nih.gov/37252752/). Menopause, 2023.
3. [Guideline No. 422a: Menopause: vasomotor symptoms, prescription therapeutic agents, complementary and alternative medicine, nutrition, and lifestyle](https://sogc.org/common/Uploaded%20files/CME-ON/gui422aCPG2110E.pdf). Journal of Obstetrics and Gynaecology Canada (SOGC), 2021.
4. [Perimenopause: From Research to Practice](https://pmc.ncbi.nlm.nih.gov/articles/PMC4834516/). Journal of Women’s Health, 2016.
5. [Executive summary of the Stages of Reproductive Aging Workshop + 10 (STRAW+10)](https://pmc.ncbi.nlm.nih.gov/articles/PMC3580996/). Journal of Clinical Endocrinology & Metabolism, 2012.
6. [Quality statement 1: Diagnosing perimenopause and menopause](https://www.nice.org.uk/guidance/qs143/chapter/quality-statement-1-diagnosing-perimenopause-and-menopause). NICE (QS143).
7. [Duration of menopausal vasomotor symptoms over the menopause transition (SWAN)](https://pubmed.ncbi.nlm.nih.gov/25686030/). JAMA Internal Medicine, 2015.
8. [Role of menopausal transition and physical activity in loss of lean and muscle mass](https://pmc.ncbi.nlm.nih.gov/articles/PMC7290663/). Journal of Clinical Medicine, 2020.
9. [Menopause transition and cardiovascular disease risk: implications for timing of early prevention](https://www.ahajournals.org/doi/10.1161/CIR.0000000000000912). Circulation (American Heart Association), 2020.
10. [High-intensity resistance and impact training improves bone mineral density in postmenopausal women with low bone mass (LIFTMOR)](https://academic.oup.com/jbmr/article/33/2/211/7605709). Journal of Bone and Mineral Research, 2018.
11. [A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength](https://pubmed.ncbi.nlm.nih.gov/28698222/). British Journal of Sports Medicine, 2018.
12. [Hormone therapy for the primary prevention of chronic conditions in postmenopausal persons: recommendation statement](https://www.uspreventiveservicestaskforce.org/uspstf/announcements/final-recommendation-statement-hormone-therapy-primary-prevention-chronic-conditions-postmenopausal-persons). US Preventive Services Task Force, 2022.