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What does marathon training do to your body? A reporter becomes the test subject

NPR | By Elissa Nadworny ,
Janet W. Lee, Matt Ozug, Henry Larson
Published October 4, 2026 at 2:57 PM PDT

Before running the New York City Marathon, NPR's Elissa Nadworny gets a bone scan, blood work and a treadmill test to settle a question from Mom: Is this bad for my body?

Copyright 2026 NPR
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All Things ConsideredHealth
Elissa Nadworny
Elissa Nadworny is an NPR Correspondent covering higher education. She previously covered reproductive rights and abortion.
Janet W. Lee
Matt Ozug
Henry Larson
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