Uploaded November 2019 | Updated September 2026, 40 minutes ago

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As a leading Ironman triathlete, Tim O’Donnell trains to swim, bike, and run — faster than anyone else in the world. Since he started training with Halo Sport 3 years ago, he's on the path to do just that.

Last year, Tim placed 4th at the World Championship. This year, he’s the fastest American, and he’s moved up to second in the world. Can he take the win next year?

Science is on his side.

Learn more: haloneuro.com