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Clip | 59s
As Lew pushes himself, his body demands more oxygen to keep it going.
Aired: 09/19/18
Video has closed captioning.
Lew Hollander, Triathlete
We learn to work together by reading the emotions and facial expressions of others.
Freya Christie, Professional Tennis Player
Freya's bones in her racket arm have become thicker to cope with her intense workouts.
What Recker does during this growing period will change the structure of his brain.
Danny demonstrates how new motor skills must be learned and developed with practice.
The story of how our body deals with damage and repair can be told through Kate's feet.
