Abdominal · Machine

Crunch — Machine

Muscles requiredRectus abdominis · Obliques · Serratus anterior

Description

Controlled torso roll-up to target the abs.

01 · Setup

Set up the movement

  • Adjust machine supports to stay aligned from start to finish.
  • Pelvis supported and back in stable support.
  • Neutral neck and low shoulders.
  • Position yourself to maintain a comfortable range of motion.
02 · Execution

Perform the rep

  1. Roll up the column gradually while going up.
  2. Contract hard at the top without pulling on the neck.
  3. Go back down vertebra by vertebra until you stretch.
Technique cue

Clean abdominal roll-up without pulling with the arms.

Common mistakes
  • pull the head with the hands
  • go up too fast
  • fall back uncontrollably
  • arch up
  • force an range of motion beyond your mobility
Safety notes

Risks of poor execution

  • The guided trajectory reduces lateral instability.
  • A forced range of motion can still overload the joints.

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