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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 5:57 PM EDT

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
Elissa Nadworny
Elissa Nadworny is an NPR Correspondent covering higher education. She previously covered reproductive rights and abortion.
See stories by Elissa Nadworny
Janet W. Lee
Matt Ozug
See stories by Matt Ozug
Henry Larson