What type of dismount consists of a double back layout without a twist from the uneven bars?

The correct answer is a dismount double layout. A dismount double layout involves executing two backward flips while maintaining a straight body position throughout the entire rotation. This is typically performed without any twists, aligning with the question's specifics of a double back layout.

In gymnastics terms, a "layout" refers to the gymnast keeping a straight body, providing a high level of difficulty and requiring significant strength and control. The execution of the dismount in this manner showcases both the technical skill of the gymnast and the artistry involved in performing a clean and high-flying dismount from the uneven bars.

This aspect of the dismount distinguishes it from other options. For instance, a double back layout-pike would require the gymnast to bend at the hips and knees, which is not in keeping with the description of a layout dismount. Additionally, the back salto 2 1/2 twist and back salto 3/1 twist both incorporate twists, which contradicts the requirement of no twists specified in the question. Thus, the dismount being referred to is indeed a double back layout, confirming the correct choice.