Duathlons & Triathlons

Check out the full calendar of Duathlon and Triathlon challenges coming up in 2025.

Sign up for a Duathlon or Triathlon

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Get in touch

If you have any questions about fundraising for NASS, please don't hesitate to email fundraising@nass.co.uk or call 020 8741 1515 (press option 2)

Contact the fundraising team

Other ways to fundraise for NASS

Walking Challenge Events

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Running Challenge Events

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Tough Mudders

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Your stories

More stories

Get inspired by reading more stories of others affected by axial SpA who have chosen to fundraise to support people with axial SpA.

Read more stories

Why your support matters

Find out why your support really does matter, the impact your support can have, and why your support has never been more urgent.

Find out more

• 220k

  Adults in the UK

  1 in 200 of the adult population in the UK have axial SpA (AS). That's twice as many as multiple sclerosis and Parkinson's disease.

• 26

  Average age

  Axial SpA (AS) is a condition that affects young people. Symptoms start late teens to early twenties, with the average age of onset being 26.

• 8.5

  Years to diagnosis

  The current average delay to diagnosis from when symptoms start is 8.5 years, by which irreversible damage to the spine may have occurred.

• 59%

  Mental health

  59% of people with axial SpA (AS) report experiencing mental health problems compared to 25% of those with musculoskeletal conditions overall.