Sarah and Coach Liz dive into data-interpretation with Coach Jen Harrison to help you understand what all those GPS numbers mean—and how they can be used to your training advantage. The coaching duo details: 
-what numbers they each keep an eye on while running, then post-workout;
-the can-you-trust-it accuracy of many stats; 
-whether the lifestyle data can be a help—or a hinderance; 
-how cadence is calculated—and what it can tell you; and,
-what those annoying “unproductive” or “inefficient” messages from your watch mean.  
Sarah and Liz talk dirty (read: about bidets!) in the intro; at 13:57, Coach Jen jumps unexpectedly into the conversation. 
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