UNTAPPED with Spencer Matthews UNTAPPED with Spencer Matthews

The Best Supplement for Running? Sodium Bicarbonate Explained | Extra Mile

Aug 27, 2026 · 32m

Summary

Spencer Matthews and Ollie Patrick discuss sodium bicarbonate as an ergogenic aid, sparked by European marathon champion Amal Petros’s use of the supplement. They explore its mechanism for buffering hydrogen ions during high-intensity efforts, noting it is most effective for events lasting one to ten minutes rather than long-distance running. The hosts debate the significant gastrointestinal risks versus potential performance gains, concluding that foundational training and nutrition remain superior for most athletes.

Topics discussed

Introduction and host banter Amal Petros and the sodium bicarbonate story Ergogenic aids vs nutritional supplements Sponsor reads: Rothy's, Midi, Upwork Expert opinions on GI distress risks Taste, dosage, and delivery methods Mechanism: buffering hydrogen ions Baking soda vs supplements and gut bypass Dosage calculations and stomach acidity Ideal event durations: 1 to 10 minutes Lactate vs hydrogen ions and fatigue How bicarbonate buffers muscle acidity Potential 3% performance gain and elite use Sponsor reads: Rothy's, Upwork, Midi Applicability to middle distance running Amateur vs elite: risk vs reward Spencer's panini race disaster story Lessons learned: race day consistency Individual variability and marginal gains Distance breakdown: 100m to 800m Simple explanation and final thoughts Sponsor reads: Rothy's and Lowe's Tire guarantee mention
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