Ab Crunch Machine
The Ab Crunch Machine isolates the Abdominals through a controlled range of motion. This intermediate-level machine exercise builds focused strength where compound movements often fall short.
Starting position
Ending position
Muscles Worked
The abdominals handles the primary load during this movement. This isolation movement keeps tension concentrated on a single muscle group.
How to Ab Crunch Machine
- 1
Select a light resistance and sit down on the ab machine placing your feet under the pads provided and grabbing the top handles. Your arms should be bent at a 90 degree angle as you rest the triceps on the pads provided. This will be your starting position.
- 2
At the same time, begin to lift the legs up as you crunch your upper torso. Breathe out as you perform this movement. Tip: Be sure to use a slow and controlled motion. Concentrate on using your abs to move the weight while relaxing your legs and feet.
- 3
After a second pause, slowly return to the starting position as you breathe in.
- 4
Repeat the movement for the prescribed amount of repetitions.
Common Mistakes
- • Focus on the mind-muscle connection — feel the target muscle working through each rep.
- • Use a controlled tempo of 2 seconds up, 2 seconds down to eliminate momentum.
- • Adjust the seat height and pad positions before your working sets — proper alignment prevents joint stress.
- • Squeeze at peak contraction for a full second — this is where most of the growth stimulus occurs.
Similar Exercises
Frequently Asked Questions
What muscles does the Ab Crunch Machine work?
The Ab Crunch Machine primarily targets the Abdominals. It's an effective isolation exercise for building abdominals strength.
Is the Ab Crunch Machine good for beginners?
The Ab Crunch Machine is rated intermediate. Beginners should build foundational strength with simpler movements first, then progress to this exercise once comfortable with the movement pattern.
What equipment do I need for the Ab Crunch Machine?
You need machine to perform the Ab Crunch Machine. Most commercial gyms will have this available.
Track Your Progress
RepStack logs every set, calculates your e1RM, and coaches progressive overload — automatically.