In performing lateral flexion against gravity such as in a lateral sit-up, which of the following muscles would be least effective?

Question

Quizplus · Accepted Answer

The rectus abdominis primarily performs flexion of the lumbar spine and does not significantly contribute to lateral flexion, making it the least effective muscle for this action compared to the others listed, which are more directly involved in lateral flexion or stabilization during such movements.

In Performing Lateral Flexion Against Gravity Such as in a Lateral