3 ms·

Actually he switches between slow running and regular walking, which is easier. Speedwalking that fast is harder than jogging.

• Gertig 16y ago
  This is the technique that olympic marathoner Jeff Galloway teaches.
  • js2 16y ago
    There's nothing wrong with Gallorunning -- heck, there are sub-3 Gallowrunners ... but they still train! :)