Today's Edition
MAYS IBRAHIM (ABU DHABI)
For 168 hours, 54-year-old Claude Louis did not sleep. Instead, he ran, rowed, skied and cycled his way through the equivalent of 28 marathons, covering about 1,181 kilometres inside a gym — under medical monitoring.
The seven-day feat, filmed in Dubai in October 2025, is now being developed into a feature-length documentary exploring endurance, ageing, and human performance.
Physical endurance was only part of the challenge. Louis wanted to explore what happens when the body reaches the point at which it wants to stop – and whether age has to dictate that.
Louis doesn't see the challenge as proof of what one athlete can withstand, or as something meant to be replicated by others. Rather, he sees it as a way of examining resilience and the assumptions people make about their own capabilities, especially as they age.
“I know I don't have limits, because for me, limit is just a perception,” Louis told Aletihad. “I wanted to know how far I can go, how far I can push my mind, and how far my body will follow.”
How It Started
A rehabilitation and performance specialist who has lived in Dubai for about two decades, Louis spent 36 years focused largely on bodybuilding before shifting towards endurance challenges three years ago.
He completed a 100-kilometre treadmill run, an Everest-equivalent climb on a Jacob's Ladder machine, and a 500-kilometre SkiErg challenge over three days without sleep.
That challenge became a turning point. “I finished very calm, very strong, and I knew I still had more in the tank,” he said.
That's when he began considering a seven-day challenge. That time, he wanted to add prolonged sleep deprivation, testing his cognitive state alongside his physical endurance.
The result was LockedIn 168, undertaken in October 2025. Every 24 hours, Louis completed the equivalent of a marathon on each of four machines: a treadmill, SkiErg, RowErg, and stationary bike.
In the two months beforehand, he deliberately reduced physical and emotional stimulation as part of his preparation for the prolonged sleep deprivation.
The hardest part, he said, was not any individual exercise but the constant mental battle between the urge to stop and the commitment to continue.
“It's how you talk to yourself,” he said.
Having already gone three days without sleep during the SkiErg challenge, Louis viewed the fourth day as the critical psychological threshold. When he passed it, he said, his confidence grew that he could reach the seventh.
Medical oversight was central to the attempt. A team led by Dr Kamal Akash of HealthBay Polyclinic conducted assessments before and after the challenge, while an emergency response team remained on site.
Louis' vital signs, including blood pressure, heart rate and blood sugar, were checked roughly every 30 to 45 minutes. Blood samples were taken every 12 hours to monitor markers of organ function.
At one point, his creatinine levels rose from earlier readings, prompting closer monitoring. However, they stayed within the accepted range and later returned to his baseline, according to his team.
The data collected also covered his calorie intake and expenditure, fluid balance and physiological and psychological responses.
Rebuilding Confidence, Challenging Fear
For Louis, the numbers mattered less than what they proved to him. The stiffness, lower energy and loss of confidence that many people associate with getting older, he argues, are self-imposed limits that can be overcome through regular physical activity.
“With the right support, guidance and knowledge, you can live the second part of your life better than the first one.”
Physical activity, he said, is a tool for rebuilding confidence and challenging fear, whether that means returning to exercise after an injury or simply doing something that initially feels uncomfortable.
“It's one step at a time,” he said. “When you break this fear, you create confidence.”
Nearly a year after LockedIn 168, Louis said he initially recovered relatively quickly, although significant fatigue emerged about a month later.
Would he do LockedIn 168 again? Not in the same form. “It would have to be longer and more challenging,” he said.
