CanFitPro Personal Training Specialist Practice Test

A Incorrect, as the characteristic of multifidus muscles is not simply surrounding a bundle of muscle fibers.

B: Incorrect, as the characteristic of multifidus muscles is not only stabilizing the lumbar spine onto the sacrum.

D: Incorrect, as the characteristic of multifidus muscles is not solely covering key muscles in the trunk. The primary characteristic of multifidus muscles is that they span the entire length of the spine, providing support and stability to the spine and aiding in posture and movement. The other options may play a role in the function of multifidus muscles, but they are not the main defining characteristic.