Abdominal Machine vs Seated Knee Up
Which one fits your Core workout plan?
Contents
Planfit users log Seated Knee Up more often — 9,913 sessions vs 3,872. Compare Core form, muscles worked, and when to use each.
Compare the benefits of Abdominal Machine and Seated Knee Up and pick the one that fits your Core workout.
Abdominal Machine vs Seated Knee Up: Which Do Planfit Users Choose?
Based on randomly selected data from 1 million completed workouts, Planfit users log Seated Knee Up more often — 9,913 sessions compared to 3,872 for Abdominal Machine.
What most people do isn't always what fits you. Abdominal Machine and Seated Knee Up differ in the muscles they work, the equipment they need, and how hard they are to learn — the comparison below covers each.
How Abdominal Machine and Seated Knee Up Differ
| What differs | Abdominal Machine | Seated Knee Up |
|---|---|---|
| Equipment | a machine | bodyweight only |
| Difficulty | 1 of 5 | 2 of 5 |
| Sessions logged by Planfit users | 3,872 sessions | 9,913 sessions |
How to Do Abdominal Machine
Abdominal Machine Muscles Worked: Core
Form
- 1. Sit with your buttocks pressed against the edge of the chair, holding the armrests and opening your chest.
- 2. With your abdomen engaged, curl your upper body as if your knees are touching your chest.
- 3. Slowly return to the starting position while keeping your abdomen tense.
Coach's Tips
- When using the equipment, do not set the weight too high, and use your abdominal muscles to move.
For a full Abdominal Machine guide with alternatives and benefits, see the Abdominal Machine exercise guide.
How to Do Seated Knee Up
Seated Knee Up Muscles Worked: Core
Form
- 1. Lift your lower body so that your knees and chest come closer together.
- 2. Allow your upper body to naturally lean forward so that your core can contract.
- 3. Slowly return to the starting position.
Coach's Tips
- If it's too difficult, try proceeding with your knees bent.
For a full Seated Knee Up guide with alternatives and benefits, see the Seated Knee Up exercise guide.
Frequently Asked Questions
Which is better for Core, Abdominal Machine or Seated Knee Up?
Planfit users log Seated Knee Up more often — 9,913 sessions against 3,872 for Abdominal Machine. Both train Core, so pick the one that matches the equipment you have and the muscles you want to load.
What equipment do Abdominal Machine and Seated Knee Up need?
Abdominal Machine needs a machine, and Seated Knee Up needs bodyweight only.
Which is easier to start with?
Abdominal Machine is the easier place to start. Move to Seated Knee Up once your form holds up.
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