Trail Notes | Female Athlete Health

training through the transition years

You are Not Declining.

You are Adapting.

Perimenopause and menopause do not mark the end of a running life. They mark the beginning of a different kind of relationship with training. One that requires more honesty, more recovery, and frankly, more intelligence than much of what the mainstream training world has been designed to offer.

Most training resources, even those written specifically for female athletes, are designed around the reproductive years. The advice to track your cycle, to plan hard sessions around ovulation, to be cautious in the luteal phase: all of that assumes a relatively predictable hormonal rhythm. Perimenopause dismantles that rhythm. Menopause removes it entirely.

What we are left with is an athlete whose body is genuinely changing, in ways that affect sleep, temperature regulation, recovery, bone density, muscle mass, and mood, navigating a world that has largely not developed the tools to support her. This Trail Note is an attempt to start filling that gap.

Trail Note  ·  01

The timeline: what we mean by perimenopause, menopause and beyond

Perimenopause is the transition phase leading up to menopause. It typically begins in the mid-40s but can start in the late 30s, and the duration varies significantly. During perimenopause, oestrogen and progesterone levels fluctuate erratically. Cycles may become irregular: shorter, then longer, heavier, then absent. Symptoms can be highly variable from month to month and even week to week.

Menopause is defined as 12 consecutive months without a menstrual period. The average age in Australia is 51, though this ranges considerably. After that point begins the post-menopausal phase, in which oestrogen settles at a new, lower baseline.

Knowing where you are in this spectrum matters for training because the physiology is different at each stage. The unpredictability of perimenopause requires a different approach to the more stable (though lower-oestrogen) post-menopausal baseline.

Trail Note  ·  02

Sleep disruption and what it means for training

Sleep disturbance is one of the most common and most debilitating symptoms of the menopausal transition. Hot flushes and night sweats frequently interrupt sleep architecture, reducing the proportion of deep restorative sleep even when total sleep duration seems adequate. Research shows that peri and post-menopausal women spend significantly more time in lighter stages of sleep and wake more frequently during the night.

For a trail runner, this has direct training implications. Recovery from hard sessions depends substantially on deep sleep. When that sleep is consistently fragmented, recovery timelines extend. What previously took 48 hours may now take three to four days. Expecting the same adaptation response from the same training load without accounting for sleep quality is a mismatch.

Discuss sleep disturbance with your GP if it is significantly affecting your quality of life and your training. Menopausal hormone therapy (MHT) has strong evidence for improving sleep quality in symptomatic women, and is one factor worth exploring as part of your broader support plan.

Trail Note  ·  03

Heat regulation and trail running

Declining oestrogen affects thermoregulation. The body's threshold for triggering sweat response changes, and blood flow to the skin that enables cooling becomes less efficient. The result for many athletes is feeling hotter during exercise than they used to, even at the same intensity, and finding heat management on trail much more demanding.

This is not imagined and it is not a sign of reduced fitness. It is a physiological shift with a real mechanism behind it. Peri and post-menopausal athletes consistently show less efficient heat dissipation during exercise in research settings. Managing heat on trail is therefore not optional: it is part of the strategy.

Trail Note  ·  04

Strength and heavy-load training: why it becomes more important, not less

Oestrogen plays a significant role in maintaining muscle mass and bone density. As levels decline through perimenopause and into post-menopause, the rate of muscle loss (sarcopenia) accelerates and the risk of bone density loss increases. In the first two years after menopause, bone loss can be particularly rapid.

The most evidence-based intervention for both is resistance training with sufficient load. Not the light-weight, high-rep circuits that have historically been marketed to older women. Heavy, progressive, compound resistance training: squats, deadlifts, loaded carries, single-leg work under load. The kind of training that places real mechanical stress on bone and genuine challenge on muscle tissue.

Research consistently shows that two to three sessions per week of progressive resistance training, combined with plyometric or impact training, is one of the most powerful tools available for managing both bone density and muscle quality across the menopausal transition and beyond.

Trail Note  ·  05

Recovery windows: why they extend and what to do about it

Recovery from hard training sessions takes longer as oestrogen levels fall. Oestrogen has anti-inflammatory properties and contributes to muscle repair processes. Without it at the same level, the inflammatory response to a hard session resolves more slowly. Soreness lasts longer. Fatigue lingers. The capacity to absorb a second hard session in close succession diminishes.

This does not mean peri and post-menopausal athletes cannot train hard. It means the structure of training needs to change. Fewer consecutive hard days. More recovery built in as non-negotiable structure, not as a concession when you are tired. Shorter blocks between deload weeks. Protein intake prioritised higher to support muscle repair.

Trail Note  ·  06

Bone density: what trail running does and does not provide

Running is weight-bearing and does provide mechanical stimulus to bone. For post-menopausal women, this is genuinely protective relative to non-weight-bearing activities. However, running alone is not sufficient to fully offset post-menopausal bone loss, because it provides primarily axial loading without the multidirectional forces that are most effective for bone remodelling.

Combining running with heavy resistance training and some plyometric work (jumping, bounding, hopping) provides a more complete stimulus for bone health. Getting a DEXA scan to know your baseline bone density is worth discussing with your GP from perimenopause, particularly if you have a family history of osteoporosis or have had periods of low energy availability in your athletic history.

Adequate calcium (around 1200 mg per day for post-menopausal women, ideally from food first) and vitamin D (which facilitates calcium absorption) are nutritional foundations that support bone health alongside training.

Trail Note  ·  07

Adapting your training: not reducing it, restructuring it

The error most athletes make in perimenopause is either to train as if nothing has changed and accumulate fatigue they cannot recover from, or to dramatically reduce load out of fear and lose the adaptations they have built. Neither serves them.

The restructuring that tends to work well looks like this: fewer total sessions but maintaining quality in the key ones. More intentional recovery built in as non-negotiable. Progressive resistance training two to three times a week as a genuine priority, not an afterthought. Continued aerobic base work because cardiovascular fitness remains highly trainable. And intensity work maintained in some form because high-intensity intervals have specific benefits for metabolic health and cardiovascular function in post-menopausal women.

Trail Note  ·  08

Menopausal hormone therapy and running

Menopausal hormone therapy (MHT, previously called HRT) is not in scope for coaching decisions. It is a medical conversation between you and your GP. But because it is relevant context for athletes navigating this stage, it is worth naming here.

Current evidence, including guidelines updated by the British Menopause Society and the International Menopause Society in recent years, has shifted significantly. For most healthy women under 60 or within 10 years of menopause onset, the benefits of MHT (including for sleep, mood, bone density, cardiovascular health and symptom management) outweigh the risks for many individuals. The picture is more nuanced than the media has historically presented.

If your symptoms are significantly affecting your sleep, your training, your mental health or your quality of life, a conversation with a GP who is knowledgeable about the current evidence base is worth having. You are not obligated to manage this without support.

Trail Note  ·  09

What to track during the transition years

Cycle tracking in the traditional sense becomes less useful in perimenopause because the cycle is no longer predictable. What becomes more useful is tracking symptoms and their relationship to training and recovery.

Trail Note  ·  10

Building your support team

Navigating the transition years as an athlete is not something you need to do alone or piece together from contradictory internet sources. A good support team makes an enormous practical difference.

A GP who understands both the current menopause evidence base and the demands of endurance sport is the foundation. Supplementing that with a sports dietitian who can support protein, calcium and overall fuelling strategies is valuable. A strength coach or physiotherapist with experience in peri and post-menopausal athletes can help you build load intelligently without injury. And a pelvic floor physiotherapist is worth seeing if you have not already, particularly if you notice leakage during running, urgency or pelvic heaviness.

Trail Note  ·  11

The invitation

If you are in perimenopause and finding that your training does not feel the way it used to, you are not losing fitness, you are not failing, and you are not too old. You are navigating a hormonal transition with real physiological consequences that your previous training approach was not designed to account for.

The invitation is to approach this phase with curiosity rather than panic or resignation. To investigate what your body needs rather than push harder hoping things return to normal. To build a team that can help you train well through this and beyond it.

We are still here on the trails. Different bodies doing remarkable things. That is exactly where we are meant to be.

adapt, strengthen, keep moving

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