Your unique approach to interval training demonstrates creativity and resourcefulness, showing that you don't necessarily need a sports watch to track your progress.

The incorporation of a captivating story through the Zombies, Run! app adds an extra layer of enjoyment and motivation to your runs.

PKeep up the great work, and may your journey to become a slightly faster runner continue to be filled with excitement, improvement, and the thrill of outrunning those virtual zombies!