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  7. Weighted Plate Lying Crunch

Exercise guide

Weighted Plate Lying Crunch

  • Beginner
  • Isolation
  • Rep-based
  • Waist

The Weighted Plate Lying Crunch isolates the rectus abdominis and obliques, using external resistance to build core thickness and strength. It is an effective progression from the bodyweight crunch that emphasizes the 'ribs-to-pelvis' contraction.

Reviewed by the Crucible team · Updated June 2026

Watch the Weighted Plate Lying Crunch demonstrationGuided video and your full workout live in the Crucible app.

Muscles worked

Primary

  • Abs
  • Obliques

Secondary

  • Erector spinae

Equipment

  • Weight plate

Setup

  1. Lie on your back with knees bent and feet flat on the floor, hip-width apart.
  2. Hold a weight plate with both hands, either resting it on your chest or holding it with arms extended straight above your shoulders.
  3. Press your lower back firmly into the floor to eliminate any arch and engage your deep core.

How to do it

  1. Exhale and curl your upper spine off the floor, lifting only your shoulder blades while keeping your lower back grounded.
  2. Pause at the top of the movement for one second to emphasize the peak contraction of the abdominals.
  3. Inhale as you slowly lower back down to the starting position, maintaining constant tension on the core.
  4. Maintain a controlled 2-1-2 tempo (2 seconds up, 1 second hold, 2 seconds down).

Form checklist

  • Keep your lower back in contact with the floor at all times.
  • Avoid leading with your chin or pulling your neck forward.
  • Focus on lifting the chest toward the ceiling rather than pulling the head toward the knees.
  • Ensure the weight plate stays in a consistent position relative to your torso throughout the rep.

Pro tips

  • For maximum tension, hold the plate with arms fully extended toward the ceiling; this increases the lever arm and makes the weight feel heavier.
  • Visualize your ribcage sliding down toward your hip bones to ensure you are using your abs rather than your hip flexors.

Make it harder

  • Perform the crunch with your legs raised in a tabletop position (90-degree bend at hips and knees) to engage the lower abdominals.
  • Hold the plate slightly behind your head with arms extended to significantly increase the resistance through leverage.

Frequently asked

What muscles does the weighted plate lying crunch work?
The weighted plate lying crunch primarily targets the abs and obliques, and also works the erector spinae as secondary muscles.
What equipment do you need for the weighted plate lying crunch?
The weighted plate lying crunch uses weight plate.
Is the weighted plate lying crunch good for beginners?
Yes. The weighted plate lying crunch is a beginner-friendly movement and a strong foundation to build on.

Related exercises

  • 3/4 Sit-UpBeginner · abs and obliques
  • 45 Degree Bicycle Twisting CrunchIntermediate · abs and obliques
  • 45 Degree Lean Back Alternate Knee RaiseBeginner · abs and obliques
  • 45 Degrees Arms PlankIntermediate · abs, deltoids, obliques, and pectorals

Train this with a plan, not guesswork

Crucible builds the weighted plate lying crunch into a precise program around your body, equipment, location, and time.

Download on the App Store