The term “knee extension” refers to the biomechanic where the leg forms a straight line. A few exercises exist that can target the upper leg to this extent.
10 Knee Exercises & Stretches Stability, Support & Kneecap Tracking
The Best Knee Workout for Stronger Joints
Yoga for Knee Pain: Best Poses, Videos and Tips
6 Exercises to Strengthen Your Knees and Prevent Injury - Muscle & Fitness
IdealKnee - Knee Extension, Knee Pain Relief & Improved Range of Motion – Endorsed by PTs & Orthopedic Doctors (by IdealStretch)(Universal Size)
Hip and Back Exercises to Improve Mobility and Alleviate Pain
/wp-content/uploads/2022/09/LEG-WORKOU
How to Do a Leg Extension, a Move for Strong Quads - Men's Journal
How to use a Leg Extension Machine
Knee exercises: Illustrated therapeutic strengthening exercises
A Physical Therapist Shares 4 Knee Exercises to Strengthen Quads
Leg Extension/Curl Attachment
7 Exercises to Relieve You from Knee Pain
A Physical Therapist Shares 4 Knee Exercises to Strengthen Quads