Ep 105: Science Corner: Energy Demands of 100 Milers & RED-S and Reproductive Health in Athlete

In Episode 105, the Trail Society crew recaps big performances at recent races, including Katie Schide’s record-setting win at Hardrock 100 and fast times from Cascade Crest and HiLo. They highlight events pushing for gender parity on start lines and discuss the return of athletes post-injury and pregnancy. There's also a quick rabbit x Trail Society product update and a listener Q&A about traveling with poles and gear for multi-day run ventures.

The second half of the episode shifts to research: Keely breaks down new studies exploring the effects of RED-S, amenorrhea, and chronic low energy availability on fertility and pregnancy outcomes. The team discusses IVF timing, egg freezing, and whether current training loads may impact reproductive health in elite athletes. They also review a study on total energy expenditure during and after a 100-mile race, highlighting the prolonged physiological stress of ultrarunning and its implications for recovery.

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This episode is brought to you by Freetrail @runfreetrail