Double-under is a conditioning movement on Fiz. Jump rope with double rotation per jump. Primary muscles: cardio, calves. Scored by reps.
Muscles Worked
Primary
cardiocalves
Secondary
shouldersforearmscore
Scoring
repstracked
Scaling Alternatives
Easier
Harder
Frequently Asked
What muscles does the Double-under work?
Double-under primarily works cardio, calves, with secondary engagement of shoulders, forearms, core.
How do you do a Double-under?
Jump rope with double rotation per jump.
How is the Double-under scored?
On Fiz, Double-under is tracked by reps. Log your reps, weight, distance, or time and build a movement history that powers leaderboards and PRs.
What's an easier alternative to the Double-under?
Easier scaling options include Single-under. Each is a standalone movement in the Fiz glossary you can swap into any workout.
What's a harder progression from the Double-under?
Progress to Triple-under when Double-under feels light.