The Marathon Handbook women’s running library — a single curated home for the physiology, training, and life-stage content that female runners actually need. Each guide is grounded in peer-reviewed sport-science research and structured around what changes across the menstrual cycle, pregnancy, postpartum, and menopause. None of this replaces medical advice; all of it is designed to give you the framework to bring to that medical conversation.
Cycle + Period
- Running on Your Period — what the menstrual cycle actually does to running, cramps + iron + bloating workarounds, race-day kit
- The Female Runner’s Body — physiology of female endurance running
- Spotting After Exercise — when bleeding outside your period is normal and when it isn’t
Pregnancy + Postpartum
- Running While Pregnant — ACOG 2020 guidelines, trimester-by-trimester adjustments, red flags
- Running Postpartum — the 12-week Goom protocol, pelvic-floor + diastasis assessment, return-to-running tests
Menopause
- Menopause and Running — strength training prescription, protein bumps, sleep architecture, HRT considerations
Nutrition + Health for Female Runners
- Iron Deficiency in Runners — why female runners are at high risk, ferritin thresholds, supplementation
- Relative Energy Deficiency in Sport (RED-S) — the IOC framework that replaced the Female Athlete Triad
Gear for Female Runners
- Sports Bra + Running Performance — the biomechanics evidence on bra fit and gait
- Period-Brief Running Shorts — the kit option for race-day overlap
The Honest Truth: 5 Things Every Female Runner Should Know
1. Female-runner physiology is different — but the training principles aren’t fundamentally
The McNulty 2020 meta-analysis on menstrual cycle and exercise performance found small, real, individually-variable performance variations across the cycle — but population-level effects of around 1–3% that don’t fundamentally change training prescription. The polarised training model, threshold work, long runs, strength sessions — all the same. What’s different: the recovery and nutritional context for those sessions across cycle phases, life stages, and (for many female runners) iron-deficiency risk.
2. Iron deficiency is the most-missed performance killer
30–50% of female endurance runners have ferritin levels below the symptomatic threshold. Standard GP iron panels often miss this because haemoglobin can be normal while ferritin is depleted. If you’re training consistently and feeling unexpectedly worse, ferritin is the cheapest diagnostic to run.
3. Menstrual irregularity is a red flag, not a feature
The narrative that “athletic women lose their periods” reflects RED-S (relative energy deficiency in sport), not normal training adaptation. If your cycles are absent, irregular, or you’ve never started menstruating despite training, the issue is almost always under-fueling relative to training load — and the consequences (bone-density loss, hormonal disruption) compound over years.
4. Pelvic-floor health is a long-game investment
Pelvic-floor dysfunction (urinary leakage during running, pelvic pressure, prolapse) affects 20–30% of female distance runners by their 50s. Most cases are preventable with proactive pelvic-floor strength work — but require the work to be specific (not just “do core”) and consistent (not just postpartum). A pelvic-floor physiotherapist assessment in your 30s or 40s pays compounding dividends across the rest of your running life.
5. Female-runner research is finally catching up
For decades, sport-science research used predominantly male subjects and extrapolated to women. The last 5 years have produced a flood of female-specific endurance research (Sims, Stachenfeld, McNulty, Bø, Bruinvels, Mountjoy, Holtzman). The training and recovery prescriptions in our women’s-running guides reflect this current literature — not the older “men’s sport science applied to women” framework that produced unhelpful or wrong recommendations for decades.
