Funding vital research
We’re on a mission to save and change children’s lives through medical research, developing treatments, vaccinations and cures.
Fighting rare disease
30% of children with a rare disease will lose their lives before their fifth birthday. With your help we can develop treatments and cures to tackle rare diseases that devastate children’s lives. Help fund vital research.
Premature birth and pregnancy complications
Some women experience complications during pregnancy which can involve the mother’s health, the baby’s health or both.
Childhood cancers
In the UK almost 4,000 children and young people under 25 are diagnosed with cancer every year. We are funding research to try and improve the chances and treatment for children with brain tumours and cancer.
Successes
With the help of all our supporters we have played a significant role in many medical breakthroughs for 70 years, starting with the development of the first UK polio vaccines.
Action's
Track Attaque
14 September 2025
Herne Hill Velodrome
Get ready for our new velodrome team event Action’s Track Attaque! A challenge of strength, determination & team spirit, where 24 teams battle it out against the 12 hour count down. Cycling relay style from 9am to 9pm, how many laps can your team complete of this 450m banked velodrome track. Want to find out?
Cycling Events
With cycling challenges both in the UK and abroad, there's definitely a challenge waiting for you. From beginners to the very experienced and with routes ranging 20 miles to hundreds of miles, come and join us in the fight for little lives.
Race the Sun
Our triathlon-style Race the Sun series pits teams against each other in a race against the setting sun, competing to bike, hike and paddle around some of the UK's most beautiful locations.
Running
Whether you’re looking for your first challenge or you’re a seasoned runner we’ve got an event for you. We have places in the world’s greatest and best-known events and races.
Latest news
Action Medical Research launches 2025 Race the Sun series
Bike, hike and paddle across the British countryside in an all-day adventure to support medical research for children.
Latest Blog
Latest research funded
Together, with charity partner LifeArc, we’re funding nearly £1m of urgently-needed new research to help children affected by rare diseases. This work will give hope to children and families facing some of the toughest fights.
Latest Video
Latest Videos
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