Which description corresponds to a 0/5 MMT strength grade (Zero)?

• A. Full ROM in gravity eliminated position
• B. No contraction felt or seen
• C. Partial ROM in test position
• D. Against strong pressure

Answer: (B)

In manual muscle testing, a zero grade means there is no detectable muscle contraction at all. This is the lowest point on the scale, indicating the muscle cannot produce any observable tension or movement, even when the limb is positioned to be moved or resisted.

The option that says no contraction felt or seen precisely matches this definition, making it the best description for a 0/5 strength grade. Other descriptions imply some level of activation or movement—for example, full range of motion with gravity eliminated suggests a functioning muscle above zero, and any partial ROM or resistance implies at least some strength is present.