Beginner
Knee extension on the floor
Quadriceps
![Knee extension on the floor](https://cdn.calisteniapp.com/images/exercise/full/EX658.jpg)
- Get into a kneeling position on the floor.
- Lean back, keeping your back straight relative to your thighs.
- Return to the starting position using the strength of your quadriceps to complete one repetition.
- You can vary the difficulty of the exercise by modifying how far you lean back.
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