Cable Crunch vs Seated Knee Up
Which one fits your Core workout plan?
Contents
Planfit users log Seated Knee Up more often — 9,913 sessions vs 2,520. Compare Core form, muscles worked, and when to use each.
Compare the benefits of Cable Crunch and Seated Knee Up and pick the one that fits your Core workout.
Cable Crunch 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 2,520 for Cable Crunch.
What most people do isn't always what fits you. Cable Crunch 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 Cable Crunch and Seated Knee Up Differ
| What differs | Cable Crunch | Seated Knee Up |
|---|---|---|
| Equipment | a machine | bodyweight only |
| Difficulty | 3 of 5 | 2 of 5 |
| Sessions logged by Planfit users | 2,520 sessions | 9,913 sessions |
How to Do Cable Crunch
Cable Crunch Muscles Worked: Core
Form
- 1. Please bend your upper body so that your abdominal muscles can contract.
- 2. Imagine that your elbows are touching your thighs.
- 3. Slowly return to the starting position.
Coach's Tips
- If you choose a weight that is too heavy, it will be difficult to control the exercise, so please select an appropriate weight.
For a full Cable Crunch guide with alternatives and benefits, see the Cable Crunch 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, Cable Crunch or Seated Knee Up?
Planfit users log Seated Knee Up more often — 9,913 sessions against 2,520 for Cable Crunch. Both train Core, so pick the one that matches the equipment you have and the muscles you want to load.
What equipment do Cable Crunch and Seated Knee Up need?
Cable Crunch needs a machine, and Seated Knee Up needs bodyweight only.
Which is easier to start with?
Seated Knee Up is the easier place to start. Move to Cable Crunch once your form holds up.
Stop Guessing Which One to Do
AI picks your workouts based on your goals, body type, and experience.

