Emma Wilkinson is an award-winning freelance journalist in the UK specialising in medicine, science and health. She has written for the Sunday Times, BBC, BMJ and Lancet, among others. She lives in northern England and runs up big hills for fun.

Definitions - Clarifies sex and gender distinctions, defines ultra sport as efforts exceeding six hours across disciplines, establishes consistent terminology, scope, and measurement choices guiding analyses of participation, performance, equity, and policy.

1. The Awakening - Opens with Jasmin Paris's Spine Race victory, leveraging preparation, sleep deprivation, navigation to beat men, challenging assumptions on endurance, gender while introducing questions, evidence, and stories developed across Ultra Women.

2. History Makers - Reconstructs histories of women's endurance-pedestrianism, alpinism, cycling, swimming-spotlighting Emma Sharp, Ada Anderson, Lizzie Le Blond, Gertrude Ederle, and others, exposing sabotage, disbelief, exclusion, and highlighting spectacle, resourcefulness, persistence, outright victories.

3. Marathon Effort - Traces women's contested entry to marathoning, from Stamata Revithi and the 1928 backlash to Bobbi Gibb, Kathrine Switzer, and Olympic inclusion, revealing medicalised myths, administrative barriers, resistance, and progressive normalisation.

4. Going the Distance - Profiles ultra pioneers Eleanor Robinson, Wendy Dodds, Helene Whitaker, Ann Trason, and others, examining Spartathlon, Badwater, mountain rounds, and stage races to show preparation, navigation, pacing, and persistence redefining success.

5. Vicarious Absence - Analyses women's underrepresentation in coverage, commentary, and sponsorship, centring Corrine Malcolm's UTMB experience, documenting pay, visibility, and authorship gaps, and proposing accountability, funding, and storytelling interventions to normalise equitable broadcasting.

6. Invisible Starting Line - Examines schooling, gender norms, safety, cost, caregiving, and time scarcity shaping who reaches start lines, synthesising data and research to recommend design, outreach, and policy creating pathways visible and accessible.

7. Sex Matters - Uses Courtney Dauwalter's unprecedented Western States-Hardrock-UTMB triple to interrogate sex differences in ultra performance, interpreting physiology, adaptation, and participation context while evaluating claims that performance gaps diminish over extreme distances.

8. Mind the Data Gap - Investigates evidence blind spots affecting women in endurance science and journalism, assessing sampling frames, instrumentation, reporting, and algorithms, and proposing registries, protocols, and community science infrastructures strengthening validity and accountability.

9. Evolutionary Advantage - Evaluates evolutionary hypotheses for female advantages, integrating physiology and life history theory, distinguishing speculation from testable predictions, and exploring implications for metabolism, thermoregulation, energetics, and training adaptations while avoiding determinism.

10. Fatigue Resistance - Synthesises mechanisms of central and peripheral fatigue over prolonged efforts, examining sex differences in neuromuscular function, substrate use, and thermoregulation, and translating findings into monitoring, training, and race management strategies.

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