Running the same routes at the same pace won't make you faster — speed work will. This guide breaks down every type of interval training, from...

Taren Gesell
ACTIVE.com Guest Writer
Taren Gesell was a leading global voice in triathlon, publishing the Triathlon Foundations book series and hosting the world’s largest triathlon podcast. He is a former world-ranked triathlete, record-setting marathon swimmer, and founder of the voice-AI training app MOTTIV