Sophie Holmes: 36 marathons in 36 days

Never Just Surviving: Sophie Holmes on Running 36 Marathons with Cystic Fibrosis

Despite a schedule packed with training, advocacy, and breaking world records, Sophie Holmes of the U.K. always makes time to share her story, and we’re so grateful she did.

Diagnosed with cystic fibrosis at just four months old, Sophie was told she might not live past her teens. But rather than letting that define her, she’s spent her life rewriting the narrative. Her latest, jaw-dropping accomplishment? Running 36 marathons in 36 days. That’s right—36 consecutive days, 26.2 miles each day, driven by pure determination and an unshakable belief in what’s possible.

Sophie is not only an elite athlete and personal trainer, she’s a powerful advocate for chronic illness awareness. In this episode of the Living with Cystic Fibrosis podcast, she talks about what fueled her through each grueling mile, how she manages the intense physical demands of endurance sports while living with CF.

“Mindset is everything.” – Sophie Holmes

It’s easy to say that exercise is one of the best things someone with CF can do. But Sophie reminds us: that doesn’t mean it’s easy. Her story is a powerful example of grit, strength, and living fully—even when the odds are stacked against you.

Sophie’s Story:

Diagnosed with cystic fibrosis at four months old

Told she might not live past her teenage years

Ran 36 marathons in 36 days, demonstrating her extraordinary endurance

Set a Lake Cuomo Ultra Ironman World Record

Believes mindset is the key to overcoming life’s toughest challenges

Works as a personal trainer and chronic illness advocate

Redefines resilience—not just surviving, but thriving

Inspires runners, athletes, and anyone living with chronic illness

Lives with relentless drive and purpose

Shows us what’s possible when you push beyond the limits others set for you

You can find Sophie Holmes on IG: https://www.instagram.com/sophiegraceholmes/

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