maratoolAb Crunch Machine
How to do the ab crunch machine
- 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.
- 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.
- After a second pause, slowly return to the starting position as you breathe in.
- Repeat the movement for the prescribed amount of repetitions.
Muscles worked
The prime movers are the rectus abdominis and the obliques, which flex the trunk forward and resist it being pulled into extension or twisted out of line.
Every exercise for:Abdominals
How this movement works
One joint changes angle and the resistance travels toward you along a single arc. Nothing is positioned to help, so tension stays where you aimed it and the usable load drops sharply against a multi-joint pull for the same muscle. Protect the range of motion; buying weight by shortening the arc defeats the point.
It is filed under strength: produce force against resistance for a countable number of repetitions, and progress the resistance over time.
What you need
The machine fixes the path, removing the balance demand and letting you train close to failure without a spotter. The cost is the stabilising work a free weight would have made you do.
Every exercise using:Machine
These train the abdominals too, using equipment this one does not:
- Ab Rollout on Knees with Barbellbarbell
- Advanced Kettlebell Windmillkettlebell
- Air Bikebody only
- Bosu Ball Cable Crunch With Side Bendscable
- Crunches with Legs on Stability Ballexercise ball
Difficulty
Listed at intermediate level. It assumes you already own the underlying pattern and can hold position under load — if the position breaks before the target muscle tires, drop back to a beginner variation until it does not.
Of the 97 abdominals exercises in this database, 17 are listed at intermediate level.
Photos: free-exercise-db — public domain (Unlicense) Full attribution →
ⓘ Informational only — not a substitute for professional fitness or medical advice.