We chat with S! Caps creator Karl King

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Scott & Don
[tabs] [tab title=”Description” ] Performance enhancing drugs in UltraRunning? Well not exactly…but Karl King has come close with S!Caps. Karl’s contribution to the trail is legendary: Sodium 341 mg + Potassium 21 mg add heat + elevation, let simmer for a couple hours and you are ready to serve up a great day on the trail. In this podcast Karl shares with us how he developed S!Caps and ways we can use them to improve our trail experience. Thanks Karl King!

His products can be purchased directly online at

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Join the discussion

  • Don’t forget to read Karl’s article on electrolyte and hydration linked in our Aid Station! There is a wonderful chart there that shows all combinations of hydration and electrolyte balance issues.

  • This was a great podcast. I had my doubts when I saw that the topic of the show was salt but it turned into one of the most informative running shows I’ve listened to in ages. Looking back, I now see that I could have really used some S! Caps on a few occasions. Thanks for this one, folks.

  • S!Caps really saved me at Across the Years a few days ago (I did my first 24 hr; second ultra ever). Nothing like taking a two pills, a bit of ginger ale, cranberry juice, and water [and a gummy worm, ahha] to make everything feel great again! Love the podcasts! Thanks TRN!

  • I listened to this on the way in and have a question. Karl says it is a bad idea to over hydrate before a race because your electrolytes will be diluted. But as you run and perspire more than usual, won’t your electrolytes come back into balance as the water in your body leaves?

    • Jason, the problem is that by hydrating in the 24 hours before a race you urinate out a lot of electrolytes. Then when you lose salt via sweating, you lose more. If you hydrate to a reasonable level, you will get hyponatremia – too little sodium for the amount of water in the body. This often results in a bad stomach and/or cramps. It stops a lot of people late in a race. There is no benefit to over hydration before a race. The body just can’t store much water beyond a proper level of hydration. So, drinking a lot before a race carries significant risk for very little or no benefit. Of course you shouldn’t start a race under hydrated. Just drink normally. It is ok to drink some fluid 10 minutes before the run starts.
      Check out our new website coming this week.

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