Do Not Fast Like a Man
Trail Notes | Fuelling & Female Physiology
Do Not Fast Like a Man
Intermittent fasting is everywhere. But most of the popular advice was built around male physiology, and for active women it can quietly work against you.
Why women are different here
If you are training regularly, under stress, in perimenopause, or already wrestling with energy, sleep, mood or hormones, long fasting windows can add more stress to a system that is already working hard. Instead of a benefit, you may get poorer recovery, worse sleep and more hormonal disruption.
The goal is not to chase restriction. It is to support the body you are asking to train, recover and adapt.
A gentler approach
A supported or fasting-mimicking approach tends to suit women better, where the body still receives a safety signal rather than a strong deprivation one. For many active women, a simple overnight fast of around 12 hours is plenty.
That usually means finishing dinner and giving your body the night to rest and digest, rather than pushing your first meal hours into a demanding morning.
The bigger principle
This sits inside a larger truth for female athletes: this is not the season to under-eat and over-train. If you are asking your body to run long, lift heavy and adapt, it needs enough energy and enough protein, spread across the day.
Her Trails coaching cue
Fuel the work. Your results, and your hormones, will thank you.
Written by the Her Trails coaching team
Trail Notes are evidence-informed coaching journals written for women who train, race and run on trails.
Go deeper inside Her Trails
See Know Your Macros: Fuel and Recover and our session with Dr Kirstey Holland in Base Camp.
General education only, not medical advice. Fasting is individual, especially with a history of disordered eating, diabetes or pregnancy. Please seek personalised support.
