Running in Perimenopause-Train smarter not harder.

By Coach Nic Baxter | NBx Running Coach

Nobody spoke about it. Nobody warned me. And I suspect nobody warned you either.

One day you're running the way you've always run — same pace, same effort, same recovery. And then gradually, things start to shift. Your easy pace feels harder than it should. Recovery takes longer. Sleep is disrupted. Your body composition changes despite nothing obvious changing in your diet or training. Some days you feel incredible. Others you feel like a completely different person is wearing your running shoes.

Welcome to perimenopause. And if you're reading this — you are absolutely not alone.

What Is Actually Happening?

Perimenopause is the transitional phase leading up to menopause, typically beginning in a woman's early to mid 40s — although it can start earlier.

During this time oestrogen and progesterone levels fluctuate significantly and begin to decline. These hormones don't just affect your reproductive system. They affect almost every system in your body — including how you respond to training, how you recover, how you sleep and how you fuel.

Here's what that can mean for your running:

• Slower recovery — lower oestrogen affects muscle repair and increases inflammation after hard efforts

• Disrupted sleep — poor sleep directly impacts performance, motivation and injury risk

• Changes in body composition — reduced oestrogen shifts fat storage patterns and affects muscle mass

• Higher injury risk — oestrogen plays a role in collagen production and joint health

• Heart rate variability — your heart rate during effort can feel higher than usual even at familiar paces

• Mood and motivation fluctuations — completely hormonal, completely normal

  
  

If any of this sounds familiar, please hear this: you are not imagining it. You are not getting weaker. You are not failing. Your body is going through a significant hormonal transition and your training needs to adapt accordingly.

The Biggest Mistake Perimenopausal Runners Make

They try to push through it.

When running starts to feel harder they assume they're losing fitness — so they train harder to compensate. More miles. More intensity. Less rest. This approach almost always backfires.

Overtraining during perimenopause — when your body is already under hormonal stress — significantly increases your risk of injury, burnout, illness and prolonged fatigue. The answer is not more. It's smarter.

Prioritise strength training-just 2 sessions a week.

How to Train Smarter

1. Protect your easy days fiercely

Easy runs should be genuinely easy — conversational pace, low heart rate. This is not laziness. This is the foundation of your training. During perimenopause your body needs those recovery days more than ever. If you only take one thing from this post, let it be this.

2. Prioritise strength training

Declining oestrogen accelerates muscle loss and reduces bone density. Strength training — even just two sessions per week — is one of the most powerful tools available to perimenopausal runners. It protects your joints, maintains muscle mass, supports your running economy and significantly reduces injury risk.

3. Sleep is non-negotiable

I know — easier said than done when night sweats and disrupted sleep are part of the picture. But prioritising sleep hygiene, keeping your room cool and managing your training load so you're not overreaching before a bad night becomes a cycle is essential. Tired bodies don't adapt. They break down.

4. Fuel properly — especially on long runs

Oestrogen affects insulin sensitivity, which means your body's ability to use carbohydrates for fuel can change during perimenopause. Don't skimp on fuel before, during or after your runs. This is not the time for under-eating.

5. Train by effort, not pace

Your pace on any given day is influenced by sleep, stress, hormones, heat and a dozen other factors. During perimenopause those fluctuations are amplified. Let go of the pace target and run by feel. Some days a 10:30 mile is genuinely easy. Some days it isn't. Both are valid.

6. Embrace the fluctuation

Some weeks your training will feel fantastic. Others will feel like wading through treacle. This is the hormonal reality of perimenopause and it's unpredictable. Build flexibility into your training plan. Give yourself permission to modify sessions when your body is telling you to.

You Can Run Strongly Through Perimenopause

Perimenopause is not the end of your running journey.

I want to say this: perimenopause is not the end of your running story. Not even close.

With the right training approach — one that works with your hormonal reality rather than against it — women in their 40s and 50s regularly achieve personal bests, complete their first marathons and fall more deeply in love with running than ever before.

What changes is not your potential. What changes is the approach.

If you're navigating perimenopause and feeling lost with your training — I'd love to help. This is exactly the kind of coaching I specialise in.

Book your free 30-minute intro call →

You deserve a plan that's built for the body you have right now — not the one you had ten years ago.

Coach Nic Baxter is an RRCA Level 2 Run Coach, ACE-Certified Personal Trainer and AFPA Pre & Post Natal Certified Coach based in Morristown, NJ. She specialises in coaching women in their 30s, 40s and beyond.