How to Learn Double-Unders (The Cue That Actually Fixes It)
A 4-step progression you can run in 10 minutes before any class, built around the one cue most coaches forget to give you.
Double-unders are one of the most frustrating skills in CrossFit. You've seen them, two rope passes per jump, looks effortless when somebody's good at them, looks like a punishment when you're trying to learn. Most people stall for months because they're trying to fix the wrong thing.
Here's the truth from coaching this skill at CrossFit BC in Olympic Village, Vancouver for over a decade: double-unders are a wrist problem, not a jump problem. Once you fix the wrist mechanics, the rest of it gets quiet very fast.
This is the exact 4-step progression we run in class, plus the one cue that breaks the plateau for almost everyone.
Why most people get stuck
The default mistake is jumping higher to give the rope more time. It feels logical. It is, in fact, the opposite of what works. Jumping higher slows your tempo, makes the rope harder to time, and burns out your calves in 30 seconds.
Watch anyone who's good at double-unders and you'll notice three things:
- Their jump barely changes height from a single-under to a double-under (maybe 2–3cm taller).
- Their elbows are pinned close to their ribs. The hands don't flap, the rope spins from the wrists.
- The tempo is faster, not slower. The rope is doing the work, not the legs.
Fix the wrists, fix the hand position, keep the jump quiet. That's the whole game.
How long it actually takes
| Starting point | Time to first 5 unbroken |
|---|---|
| Can do 100 unbroken singles | 2–4 weeks · 10 min/day, 3x/week |
| Singles are inconsistent | Spend 1 week on singles first |
| Never used a jump rope | 4–8 weeks total (singles → doubles) |
This assumes a properly sized speed rope and 10 honest minutes of practice. If you only practice doubles when they show up in a workout, you'll struggle for years.
Step 1, Get the right rope, sized correctly
Before anything else: a basic speed rope (not a beaded rope, not the gym's communal rope) sized to your height. Stand on the middle. Handles should reach the bottom of your sternum. Most people are using a rope that's 6–10 inches too long, which makes the rope hit the ground too early and feels like the rope is "fighting" you.
If you can't buy your own rope, ask your coach to size one of the gym's ropes for you and write your name on it. Most CFBC members keep their personal rope on the rack.
Step 2, 100 unbroken singles, relaxed
Before you touch a double, you should be able to do 100 unbroken singles with:
- Elbows close to your ribs (not flaring out).
- A quiet jump, barely off the floor.
- Relaxed shoulders. If your traps are loaded, you're jumping wrong.
Practice this until it's effortless. It will feel boring. It is the most important step.
Step 3, The "single, single, double" drill
This is where 80% of the breakthrough happens. Instead of trying to chain doubles, practice this rhythm:
Single → Single → Double → Single → Single → Double
The two singles set your tempo. The double slots in without changing your jump height. Just spin the wrists faster for that one rotation. Don't jump higher.
Do 3 sets of 30 seconds. Then 5 sets. Then 10 sets. When this drill feels easy, you're ready to chain doubles.
Step 4, Chain doubles in small sets
Start with sets of 3. When 3 is reliable, sets of 5. Then 10. Don't chase a big number, chase clean reps. A messy set of 20 reinforces bad habits; a clean set of 5 builds the pattern your body will use forever.
The cue that fixes it for almost everyone
If you only remember one thing from this article, remember this:
"Pin your elbows. Spin the wrists. Don't jump higher."
Say it out loud before each set. Most plateaus are the body forgetting to pin the elbows under fatigue, the hands drift wide, the rope angle changes, you start hitting your shins. Re-cue the elbows and 90% of the problem disappears.
Common mistakes (and how to fix them)
- Hitting your shins: hands too wide. Pin elbows to ribs.
- Rope hitting the ground in front: rope too long, or you're looking down. Look at the wall, not your feet.
- Calves cramping in 30 seconds: jumping too high. Quiet the jump.
- Rope keeps stopping at the top: wrist tempo too slow. Spin faster, not harder.
- Tense shoulders: grip is too tight. Loose hands, fast wrists.
How CrossFit BC programs this skill
Double-unders are one of the skills we treat as practice, not punishment. They get their own time in our warm-ups and in our dedicated skill blocks, we don't expect you to figure them out in the middle of a WOD with your heart rate at 180.
This is the same approach we take to pull-ups, handstand push-ups, and Olympic lifts. Read more about how we program skills, or come try a class and let one of our coaches watch your set, most plateaus get fixed in 60 seconds with a real-time cue.
A 10-minute practice block you can run before any class
- Min 1–2: 100 unbroken singles, relaxed.
- Min 3–6: Single-single-double drill, 30 seconds on, 30 seconds off.
- Min 7–10: Chain doubles in small sets, 3, then 5, then 10.
Do this 3x/week for 4 weeks. You'll have your first unbroken set. Promise.
Want a coach to watch your reps? Try 3 free classes at our Olympic Village gym, bring your rope, we'll fix the cue in person.