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How to do the Cocoons

CoreAbsBodyweightIntermediate

Cocoons are a deceptively powerful bodyweight movement that train your abs through a full range of compression, demanding both strength and coordination from your core. Master this exercise and you build the kind of functional midsection control that carries over to every athletic demand you face.

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Muscles worked

Primary
AbdominalsObliques
Secondary
Hip flexorsLower back

Step-by-step

  1. Lie flat on your back with arms extended overhead and legs straight just above the floor.
  2. Simultaneously draw your knees into your chest while reaching your arms forward to meet them, compressing your core fully at the top.
  3. Pause briefly at peak contraction before slowly reversing the movement under control.
  4. Return your arms and legs to the start position without letting either touch the ground, then repeat.

Common mistakes

  • Letting the lower back arch away from the floor on the extension phase, which shifts stress off the abs and onto the spine. Fix this by consciously pressing your lower back down and keeping your core braced throughout.
  • Using momentum to swing the knees in rather than actively pulling them with the abs. Fix this by moving deliberately and pausing at full compression to confirm muscular control.
  • Holding your breath during the crunch phase, which spikes intra-abdominal pressure and reduces core stability. Fix this by exhaling sharply as you compress and inhaling on the extension.

Pro tip — At the fully compressed top position, actively try to pull your knees and elbows closer together even if they cannot physically move further, this isometric intensifier deepens the ab contraction and accelerates strength gains without adding reps.

Sets & reps by goal

Build muscle3–4 sets × 10–15 reps
Get stronger3–4 sets × 6–8 reps
Lose fat / tone3 sets × 12–20 reps

Rest: 60–90 sec between sets.

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