Powering performance
at the edge of endurance.

2,000 mi

Around Great Britain

<49 days

World record target

2 on / 2 off

Continuous rowing shifts

24/7

WHOOP biometric tracking

The world's toughest rowing race.

PEAK4 is the official performance partner of Team Nautilus, supporting six rowers through 2,000 miles around Great Britain using real-time biometric data, expert coaching and precision nutrition.

Only 10 teams have ever completed an unsupported row around Great Britain - fewer than have crossed the Atlantic. Team Nautilus departs Tower Bridge in June 2026 targeting a sub-49 day world record.

Volatile conditions

Changeable winds, fast-turning tides and the most turbulent maritime conditions on Earth. A greater test of endurance and navigation than open ocean crossings.

Round-the-clock effort

Two hours on, two hours off, continuous for up to 49 days. Permanent sleep deprivation, permanent recovery demand, permanent physical output.

Total resilience required

Flawless crew cohesion, tactical adaptability and extreme physical stamina. Performance data gives the team an edge where instinct alone is not enough.

Data-driven performance support, every mile.

The PEAK4 expert team monitor biometric data across sleep, recovery and strain in real time, feeding structured coaching insight back to the crew throughout the challenge. Every shift is tracked. Every recovery window is optimised.

Shop the performance stack

What happens to the body at the extreme end of endurance.

Chronic sleep restriction reduces cognitive function and increases injury risk within 48 hours. HRV decline signals accumulated fatigue before subjective symptoms appear. Managing recovery windows between two-hour shifts is the difference between a consistent finishing crew and one that accumulates irreversible physiological debt.

A mission beyond the oars.

Every stroke collects real science. Team Nautilus carries integrated filtration systems and eDNA samplers developed with the University of Portsmouth - gathering critical data on microplastics, sea temperature and marine biodiversity in real time.

Nautilus science report