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henry copeland: Two surprise lessons from observing my heart rate with a new @fitbit Charge. pllqt.it/uLiasx

Fitbit charts a wild heart and a calming mind

Humans rely on two feats of engineering, each astonishing in its own right. First, the body is endowed with an ability to constantly and instantly adjust to changing conditions. And, second, the body has an equally constant and instantaneous capacity to suppress awareness of those adjustments.
- racery.com
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