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Machine Crunch guide
The Machine Crunch is a beginner-level isolation machine exercise that primarily targets the Rectus Abdominis. Set up with a braced, stable base, move through a full range of motion under control, and progressively add weight or reps over time to keep getting stronger.
What muscles does the machine crunch work?
The Machine Crunch primarily trains the Rectus Abdominis, with the core as the target group. Train it as part of a balanced core routine.
How do you do the machine crunch?
To do the Machine Crunch: set up at the machine with a stable, braced position — feet planted and core tight; take a grip or stance that lets your core drive the movement through its full range of motion; lower under control, then drive back to the start, keeping tension on the rectus abdominis; avoid momentum, breathe through each rep, and stop 1–2 reps short of failure on most working sets.
- Set up at the machine with a stable, braced position — feet planted and core tight.
- Take a grip or stance that lets your core drive the movement through its full range of motion.
- Lower under control, then drive back to the start, keeping tension on the rectus abdominis.
- Avoid momentum, breathe through each rep, and stop 1–2 reps short of failure on most working sets.
What are the most common machine crunch mistakes?
- Using momentum or bouncing instead of controlled tension.
- Cutting the range of motion short to move more weight.
- Adding load before the current weight is clean for every rep.
Machine Crunch alternatives
Machine Crunch FAQ.
What muscles does the Machine Crunch work?
The Machine Crunch primarily targets the Rectus Abdominis, training the Core as the main muscle group.
Is the Machine Crunch a compound or isolation exercise?
The Machine Crunch is an isolation exercise — it focuses on one muscle, which is useful for targeting and bringing up weak points.
What equipment do I need for the Machine Crunch?
You need a machine. Difficulty is rated beginner.
What are good alternatives to the Machine Crunch?
Good core alternatives include Plank, Crunch, Side Plank.
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