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Cross Knee to Elbow Pulse

The cross knee-to-elbow pulse is a standing oblique drill: one knee drives up and across toward the opposite elbow, meets it, then pulses at the top before returning. It trains rotation and balance on your feet — no floor, no mat, no excuses — which makes it a natural fit for warm-ups and standing core circuits. Coached by Maddy (NASM-CPT) — these are the exact form cues he gives on every client's first week.

Muscles worked

Obliques Abs · rectus abdominis Deep core · transverse abdominis

Sets & reps by goal

GoalSets × RepsRest
Strength3 × 3–6 per side (3 s hold at top)60–90 s
Muscle3 × 9–12 per side60 s
Endurance2–3 × 18–27 per side45 s

Level — Beginner

Beginner-friendly — the balance element is the hidden challenge that sneaks up on everyone.

Proper form — 5 cues

  1. Stand tall with hands behind your head, elbows held wide.
  2. Drive one knee up and across your midline toward the opposite elbow.
  3. Crunch the ribs down and rotate to bring elbow and knee together.
  4. Add a small double pulse at the meeting point before lowering.
  5. Return to full standing height between reps — completely tall, then go again.

Breathing: Exhale as knee and elbow meet and through the pulses, inhale returning to tall.

The 3 mistakes Maddy corrects most

Dragging the elbow down to a lazy knee. The folding arm meets a half-lifted knee in the middle, and the obliques never actually rotate the trunk. Fix: Keep the elbows wide and make the knee do the travelling — the ribs rotate to close the final gap.
Skipping the return to tall standing. Staying hunched between reps shrinks the range until the movement is a wobble in the middle. Fix: Stand fully upright — hips extended, chest open — before every new rep.
Losing balance and hopping through reps. The stagger means the standing leg's stabilisers are overwhelmed and the trunk work is lost to flailing. Fix: Slow the tempo, fix your eyes on a point ahead, and shrink the pulse until balance returns.

Common questions

What is the pulse at the top for?

The double pulse extends the time your obliques spend at their shortest, hardest-working length — the position most standing core moves only pass through for a split second. It converts a quick touch into a real contraction, and it doubles as a balance challenge because the standing leg must stabilise you through the extra beat.

Are standing ab exercises as good as floor work?

They train a different, equally valuable quality: producing and resisting rotation while upright on one leg — which is how the core actually operates in walking, running, and sport. Floor work isolates harder; standing work integrates. A complete week has both, and this drill is one of the best zero-equipment entries on the standing side.

How fast should I do knee-to-elbow pulses?

Slow enough that you could freeze at the top on command — roughly two seconds up including the pulses, one second down. Speed is the great corruptor here: fast reps turn into bouncy hip swings with no trunk rotation at all. If you want more intensity, add a hold at the top rather than tempo.

Related exercises

Easier: Knee to Elbow Touch

Bicycle KicksObliques Bicycle Kicks (Modified)Obliques Downward Dog Cross Knee to Elbow TouchObliques Downward Dog Knee to Elbow TouchObliques Downward Knee to Elbow TouchObliques

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