What rope should I buy for double-unders?

A speed rope with adjustable length and lightly weighted handles. Coated cable spins faster and stings less than bare wire. Avoid heavy weighted ropes for learning — they hide bad mechanics.

How long should my rope be?

Stand on the middle of the rope. The handles should reach the bottom of your sternum to your collarbone. Too long is slow. Too short clips the floor on every rep.

Why do my double-unders work warming up but break in workouts?

Because fatigue exposes mechanics. Under fatigue your shoulders rise, your wrists stop spinning, and you start jumping vertically instead of bouncing. Train tired on purpose so the pattern survives.

How often should I train double-unders?

Daily for short bursts is best. Three to five minutes of skill work before or after class is enough. They are a nervous system skill — frequency beats volume.

Why do I keep tripping after 5 reps?

You are jumping higher each rep instead of spinning the rope faster. Stay low and tight. The rope speed makes the rep, not the jump height.

Why do I whip my legs?

Two reasons: rope is too long, or your wrists are stiff. Shorten the rope first. Then drill wrist-only spins without jumping until your hands learn the rhythm.

How long does it take to learn double-unders?

For an athlete with decent single-unders, two to six weeks of daily 5-minute practice is typical for first reps. Unbroken sets of 30+ usually take 2 to 4 months of consistent work.

Should I just buy a heavier rope to learn?

No. Heavy ropes mask bad wrist mechanics. Learn on a normal speed rope. The skill transfers to any rope. Bad habits learned on a heavy rope do not.

Why does my heart rate spike so hard?

Tense arms, high shoulders, and panic-jumping. Relaxed shoulders and a tight core lower the cost dramatically. Double-unders should feel light, not desperate.

Are double-unders worth chasing if I just want to be fit?

Yes. They are one of the cheapest, most efficient ways to train coordination, calf strength, and conditioning at the same time. And they unlock dozens of CrossFit workouts.

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Your First Double-Unders: A Coach's Step-by-Step Plan

Still whipping yourself with the rope? Double-unders are coordination, not cardio. Fix your wrists, not your lungs.