salz.run
Field Notes 3 entries

Notes from the
field lab.

Essays on sweat, salt, heat, and the slow craft of running long. No clickbait, no SEO bait — just the science I dig up and the protocols I'm testing on myself.

#cost #diy #field-test #intro #kit #protocol #running
May 6, 2026
#diy · #kit · #cost

The DIY electrolyte kit: four ingredients, one cart

I switched from $1.50-per-stick pre-mixes to four powders and a kitchen scale. Costs about $0.25 a bottle and works better for the kind of running I do.

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Apr 22, 2026
#protocol · #field-test

How to measure your sweat rate in 90 minutes

The single most useful data point for hot-weather running. You need a bathroom scale, a water bottle, and one hour of honest effort.

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Apr 8, 2026
#intro · #running

Why I built salz.run

I'm Sean. I'm a heavy sweater training for my first 100K, and the LMNT bills got embarrassing. So I sat down with a scale.

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