Heart Rate Zones - Constantiagear.com

Heart Rate Zones

Heart rate training basics: What can heart rate training do for you? Heart Rate training is very simple. You have five zones but most people don’t ...

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Kilometer Short Design Story - Constantiagear.com

Kilometer Short Design Story

Requirements for Running Shorts When designing the Kilometer Short, we started out by creating a list of requirements needed out of running shorts....

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