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Running
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After a big announcement and a conversation about recent races, we welcome Cat Fitzgerald, PT, of Custom Performance in New York City , for an important discussion about underfueling, Relative Energy Deficiency in Sport (RED-S), and injury risk in runners.
Cat explains how insufficient energy intake can affect recovery, bone health, hormones, performance, and the body’s ability to withstand training. They discuss signs that a runner may be underfueling, why RED-S is not limited to athletes in a particular body type or at a particular level, and how runners can better support their training through adequate nutrition and recovery.
Cat Fitzgerald is a physical therapist with Custom Performance, a New York–based practice that helps athletes return to sport, build resilience, and stay healthy through individualized physical therapy and performance care. Learn more about Custom Performance at customperformancept.com.

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Episode 292: When to Quit
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"Episode 285: Some News, Some Tears, & a Discussion on Red-S with Physical Therapist Cat Fitzgerald." is an episode of Run Farther & Faster — The Podcast with Coaches Lisa Levin and Julie Sapper. Runtime 50 min. Published July 9, 2026. Hit play above to stream it here, or open the free Spot Sports app for background play and offline downloads.