1
Stand with feet shoulder-width apart, knees slightly bent, arms positioned with hands behind head or across chest, maintaining neutral spine alignment
2
Engage core muscles by drawing navel toward spine; maintain neutral head position with chin slightly tucked
3
Slowly lower torso backward by extending through the thoracic spine, allowing controlled spinal extension while keeping core engaged throughout the movement
4
Contract abdominal muscles to return to upright standing position, flexing spine and drawing ribcage toward pelvis to complete the crunch repetition