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I spent the last month testing and reviewing the Garmin Forerunner 970, and my biggest disappointment (one of only a few) was that I couldn’t use it to test my running economy, since it requires a heart rate monitor like Garmin’s HRM-600 chest strap. At the same time, it does lend a lot of legitimacy to Garmin’s running economy metric, knowing it requires key inputs like heart rate, stride length, ground contract time, vertical oscillation, and step speed loss.
“Running economy” has a lot of buzz around it right now. When I asked a running coach (who happens to be a good friend) what separates two athletes with identical cardiovascular fitness, they pointed to the concept of running economy. Now I’m considering buying the additional chest strap, because I’m just that intrigued by this metric.
However, whenever a term migrates from exercise
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