Fibre might not be the “sexy” side of sports nutrition, but it’s one of the most overlooked foundations of runner health and performance. In this episode, we dig into the viral concept of fibremaxxing and whether it actually makes sense for runners.

You’ll learn what fibremaxxing really means, why most adults fall far short of fibre recommendations, and why decades of research support fibre’s role in gut health, chronic disease prevention, blood sugar control, and appetite regulation.

We also talk through:

• Where the fibremaxxing trend came from and what it gets right

• The best food sources of fibre and why variety matters more than any single “superfood”

• The difference between soluble and insoluble fibre and why runners need both

• Potential downsides of going too hard, too fast with fibre

• Timing fibre intake around training to avoid GI issues

• How very high fibre intakes can impact energy availability and performance

• Fibre supplements vs whole food sources (and when supplements can make sense)

Finally, we answer the big question: Should runners fibremaxx?
The short answer is yes, most runners would benefit from more fibre — but with smart timing, gradual increases, and an eye on total fueling needs.

Bottom line: Fibre is good, most runners need more, and like all good things, more isn’t always better if it interferes with fueling or performance.

Looking for the resources mentioned in today's episode?

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