Pushing human limits is thrilling, even without prior training. Endurance is a crucial skill for athletes, whether it's running long distances, maintaining tough positions, or scaling mountains without ropes. Discover three of the toughest endurance challenges featured.

00:00 - Introduction to Endurance Sports
01:05 - Marathon Without Training
06:42 - Squatting for 24 Hours
13:07 - Free Climbing Adventure

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