The vastus medialis oblique (VMO) is listed as underactive in which region?

• A. Underactive feet muscles
• B. Underactive knee muscles
• C. Overactive feet muscles
• D. Overactive knee muscles

Answer: (A)

The vastus medialis oblique helps stabilize the patella during knee movement, so its timely activation is crucial for proper knee tracking. In this testing framework, regions are used to group muscles by the area of influence or the pattern of activation that’s being assessed. The VMO is listed as underactive in the feet muscles region because foot/ankle mechanics can affect knee alignment and how the VMO engages during weight-bearing activities. If foot muscles aren’t activating well, the kinetic chain can cause less VMO activation to be recruited, highlighting an interconnected pattern where a knee stabilizer shows up as underactive within the feet region.

So, the key takeaway is that improving foot and ankle control can support better VMO engagement and knee alignment during movement.