12 Months to Marathon

Episode 101: Lost 168lbs and Became a Runner - Mark Simpson's Incredible Transformation

John Season 1 Episode 101

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0:00 | 48:06

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What happens when you reach a point where enough is enough?

In this episode, I’m joined by Mark Simpson, whose journey from 25 stone (350lbs / 159kg) to completing his first half-marathon is one of the most inspiring stories we've featured on the podcast. 

Mark opens up about decades of struggling with his weight, being diagnosed with Type 2 diabetes, the emotional impact of obesity, and the moment he decided to take control of his life.

We discuss:

  •  How Mark lost over 12 stone (168lbs / 76kg) 
  •  The role weight loss medication played in his transformation 
  •  Why consistency matters more than perfection 
  •  The mental and emotional challenges of long-term weight loss 
  •  Building confidence after years of feeling trapped 
  •  Discovering running and completing his first 10K and half-marathon 
  •  Social media, accountability, and inspiring others 
  •  Men's mental health and the importance of talking openly 
  •  Why is it never too late to change your life 

This is an honest conversation about health, self-belief, resilience, and what's possible when you decide to give yourself one more chance.

You can follow Mark's journey on Instagram:

@shrinking_simmo

If you're over 35 and training for a race, or simply looking for support with your running, you can join our free running community via the link in my Instagram bio:

@12monthstomarathon

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