Penguin taps
A double under's timing with no rope to trip on: one jump, two taps.
3 × 10 in a row
Not enough air for a double
Like the rope is just too fast.
The cue
“One big pop, two fast flicks.”
What it looks like
Every jump is a quick little single-height hop.
Why it costs you doubles
The rope has to go round twice while you are off the floor. At single height there is not the time, however fast the wrists are.
Before you drill it: is your rope too long? Check your rope length. Compare rope types for your rung.
The fix
The drills for it, best first. The figure is the first one, at half speed — tap it to pause.
Power singles
Double-under height with single-under wrists, so the jump is ready before the wrists are.
3 × 15
One and done
Your first double under, with nothing after it to worry about.
10 attempts
Can the camera see it?
dulike can see this one from any angle.
It watches your body, not the rope: a speed rope is a few millimetres across and faster than a phone records. Whether a jump was a double is estimated from your time in the air, and how it works shows every threshold.
Not sure this is you? Film 10–30 seconds of skipping and dulike will check — along with the other faults it can see, and the one to fix first.