Julio Mamute’s story shows how a person can turn a life‑threatening condition into a remarkable achievement. Reading about his journey from extreme obesity to finishing the Great Wall Marathon reveals the power of determination and smart training.

At his heaviest, Mamute weighed over 310 kg, was confined to his bed and relied on a CPAP machine for breathing. He depended on the machine each night to keep his airway open.

In November 2023 he started an underwater exercise class and soon began swimming twice a day. He says the low‑impact water workouts helped him lose about 100 kg, a large part of his total weight loss.

Mamute openly documented his struggle on YouTube and Instagram, gathering millions of followers. He linked his progress to charitable food‑donation projects and studied neuroscience to re‑wire his compulsive eating habits.

On Oct 25 2026 he completed the 10 km Great Wall of China Marathon, tackling 4 km of rugged trails and a 700 m steep stone‑step section. He described the race as the most grueling physical trial of his journey.

Looking ahead, Mamute aims to drop below 100 kg, have skin‑removal surgery and run a full marathon from Marathon to Athens in 2028. His story reminds us that focused effort and mindset shifts can reshape even the toughest challenges.