In gravity-minimized knee extension, which statement best describes the bottom knee position during the test?

In gravity-minimized knee extension, which statement best describes the bottom knee position during the test?

• A. The bottom knee should be fully extended for stability
• B. The bottom knee should be abducted for stability
• C. The bottom knee should be neutral with no flexion
• D. The bottom knee should be slightly flexed for improved stability

Answer: (D)

Gravity-minimized knee extension aims to reduce the external load so you can assess the quadriceps' ability without gravity doing the work or fighting the movement. Having the bottom knee in slight flexion creates a stable base and prevents the knee from drifting into hyperextension or sagging due to gravity. That small bend also reduces passive tension in the hamstrings and makes it easier for you to stabilize the thigh, improving alignment and minimizing compensatory movements around the hip, trunk, or ankle. If the knee were fully extended, gravity could alter the torque on the joint and mask the true strength of the quadriceps; if there were no bend at all, the limb could feel unstable and substitutions become more likely. So a little knee flexion—about 20 to 30 degrees—gives the best balance of stability and isolation for an accurate gravity-minimized test.

Gravity-minimized knee extension aims to reduce the external load so you can assess the quadriceps' ability without gravity doing the work or fighting the movement. Having the bottom knee in slight flexion creates a stable base and prevents the knee from drifting into hyperextension or sagging due to gravity. That small bend also reduces passive tension in the hamstrings and makes it easier for you to stabilize the thigh, improving alignment and minimizing compensatory movements around the hip, trunk, or ankle. If the knee were fully extended, gravity could alter the torque on the joint and mask the true strength of the quadriceps; if there were no bend at all, the limb could feel unstable and substitutions become more likely. So a little knee flexion—about 20 to 30 degrees—gives the best balance of stability and isolation for an accurate gravity-minimized test.