Chris Seymour ran the Marathon Grand Slam, aka 7 marathons on 7 continents plus a Marathon in the North Pole, while raising funds for metachromatic leukodystrophy, or MLD for short, a very rare disease that only around 41,000 people in the world are living with. All the scoop about this challenge, with a special emphasis on the North Pole Marathon, in this episode!

Learn more about MLD and Chris her: www.runovermld.com

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