Greg Whyte & Sara Cox
The Great Northern Marathon Challenge
Our co-founder Professor Greg Whyte OBE is training and running alongside Sara Cox as she takes on her toughest endurance feat yet, covering 135 miles across Northern England in support of BBC Children in Need.
This marks Greg’s 40th charity challenge, continuing his legacy of helping others push beyond their limits through preparation, performance and recovery. Together, Greg and Sara will test both body and mind over five consecutive days, powered by U Perform’s science-led approach to recovery and resilience.
Broadcaster and long-time supporter of BBC Children in Need, Sara is taking on her biggest physical test to date. Known for her warmth and determination, she is running to inspire others and raise funds for children and young people across the UK.
An Olympian and one of the world's leading experts in endurance performance, Greg has trained and completed some of the most iconic celebrity charity challenges, and as U Perform's co-founder, he brings science, structure and motivation to every step of Sara's journey.
Four marathons done & over 100 miles completed!
Sara’s in pain, swollen, and exhausted, but she’s still smiling after raising over £4 million for Children in Need.
One more day to go, the home stretch is in sight.
An absolute legend! 💪
The Marathon Bundle
Support your own performance and recovery with the U Perform Marathon Bundle, designed to keep you training consistently and recovering faster.
What’s Included:
3 x Active Collagen – Delivers 8,000mg of Bioactive Collagen Peptides® to support tendons, ligaments, and muscle recovery, helping you stay strong and reduce injury risk.
1 x Active Greens – A nutrient-rich blend of 16 superfoods, adaptogens and probiotics to boost energy, immunity, and overall vitality.
1 x U Perform Bottle (Free) – Perfect for mixing your daily supplements and staying hydrated on the go.
1 x Guide to Marathons (Free) – Expert advice from Professor Greg Whyte OBE on training, recovery, and performance.
As Greg takes on his 40th challenge and supports Sara through every mile, U Perform is proud to be part of their journey, showing that recovery is the foundation of endurance and performance.
Follow along for daily updates, recovery insights and behind-the-scenes moments from the road.
