Pogo hops
Teaches the legs to stay long and the ankles to do the work, with no rope to worry about.
3 × 20 hops
Kicking your feet up on double unders
Like you are jumping high. You are not — your legs are getting out of the way.
The cue
“Pogo stick, not a frog.”
What it looks like
The heels fly back (a donkey kick) or the knees tuck up, so the feet rise much further than the hips do.
Why it costs you doubles
Bent legs shorten you and make the landing late and heavy, so the next jump starts from a squat and the rope catches the toes.
The fix
The drills for it, best first. The figure is the first one, at half speed — tap it to pause.
Bouncy singles
The rhythm every double is built on: small, quick, and the same every time.
3 × 45 seconds, 30 seconds rest
Single, single, double
The classic bridge: two singles to reset the rhythm, one double, and round again.
5 × 5 cycles
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.