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Cartoon before-and-after image of a man’s fitness journey: left panel shows him with a belly, right panel shows him lean, muscular, and wearing a "SUB-3" running vest.

What’s the ideal body fat for a sub-3 runner?

Shedding excess body fat won’t help everyone - but for me, it was the gamechanger that took my sub-3 running to the next level. Here’s how I did it, what I learned, and why it’s not for everyone.
Patrick Hayes 22 Aug 2025
Marathon runner in a SUB-3 vest faces a split path: one leads to a finish line showing 2:55:00, the other to a toilet, highlighting a race-day dilemma.

What if I need to go to the toilet during a sub-3 marathon attempt?

It’s not the most glamorous aspect of marathon running, but it’s one nearly every runner has worried about at some point: what if I need the toilet mid-race?
Patrick Hayes 22 Aug 2025
Illustration of a triumphant runner in a crowd wearing a Sub‑3 medal, highlighting the elite 0.005% of people worldwide who complete a marathon in under 3 hours.

How rare is sub‑3? A back‑of‑the‑envelope estimate

Despite rising participation and faster technology, sub-3 remains one of the most selective milestones in endurance sport – reached by only a minute share of runners each year.
Patrick Hayes 22 Aug 2025
Before-and-after photos of a runner’s transformation from overweight half marathon finisher to lean sub-3 marathoner crossing the line at Brighton Marathon.

How I went from being obese to running sub-3 in 12 months

A year after hitting my heaviest weight, I ran a sub-3 marathon. This is the journey, the lessons, and the mindset that made it possible.
Patrick Hayes 22 Aug 2025
Three pairs of Nike ZoomX Alphafly running shoes in bright neon colours stacked on a wooden table outdoors — popular carbon-plated racing shoes among sub-3 marathon runners

Do Alphaflys help you run a sub-3 marathon?

Sub-3 stays with you for life. And in my view, these shoes can help make it happen.
Patrick Hayes 22 Aug 2025

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