THE FAB FOUR | Women HIIT Workout

HIIT Workout by @eleanor_byrne In this HIIT women workout video series, Eleanor will show you the Fab Four. The 4:1 work-to-rest ratio, meaning your work time is four times as long as your rest time. The 4:1 work-to-rest ratio is used frequently across all levels because it challenges you to work at your maximal heart rate for a short but intense burst.