Hydration Packs for 2012 and Beyond

In any climate, staying hydrated keeps you from unnecessary exhaustion and prevents unreasonable levels of stupidity. Your body can lose about two liters of fluid before you even notice symptoms of thirst, but losing that much changes electrolyte concentrations and affects how your body and mind function.

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Good Shovels Make Good Gardens — Digging Deep for Fitness

A few decades ago in the foundry where I shoveled sand into molds and busted up ingots with a sledgehammer, we’d joke about telling people it was a health spa and charging them to do the work. People now pay for the privilege of swinging a sledgehammer at an old tire, under a trainer’s supervision. From what I’ve seen of that, neither coach nor participant know much about sledgehammers.

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