Running

Running a negative split — finishing faster than you started — is the single most reliable pacing strategy for endurance performance. Here is the physiology behind it and how to use Garmin data to execute it.

Running economy — how efficiently you convert oxygen into forward momentum — is one of the most important determinants of running performance and one of the most trainable. Here is how to understand and improve it.

Running heart rate zones differ significantly from cycling zones due to biomechanics and muscle recruitment. Here is why copying your bike HR zones into your Garmin for running is sabotaging your training.