Chinese ultramarathon runner Huang Zhenglong, better known as Long Shao, accomplished something that sounds almost impossible: he ran 100 kilometers every day for 100 consecutive days.

His record-breaking challenge began on December 6, 2025, and ended on March 15, 2026, in Foshan, Guangdong, China. By the time he crossed the finish line, he had covered exactly 10,000 kilometers. Guinness World Records officially recognized him for the most consecutive days running 100 km by a male.

The numbers are difficult to comprehend. A standard marathon is 42.195 kilometers, meaning Long Shao was effectively running about 2.37 marathons every day. Guinness says he typically began at around 7 a.m. and finished between 5 p.m. and 7 p.m., spending roughly 10 hours each day running at an average pace of about six minutes per kilometer.

The challenge wasn’t painless. Long Shao suffered a foot injury around the tenth day and also dealt with constant fatigue and the mental strain of repeatedly covering the same route. He was supported by a professional nutritionist and medical team, while other runners increasingly joined him during the challenge.

Long Shao had already become known as “China’s Forrest Gump” because of his extraordinary running challenges. During the COVID-19 pandemic, he closed his business to devote himself to running, and he had previously completed a 365-day running challenge across China.