Rotary torso machines have different designs.

You sit on some torso rotation machines, and you kneel on others.

Some machines hold your legs in place while you twist your torso; other machines hold your torso in place while you twist your legs.

Regardless of the design, rotary torso machines target your core muscles.

The obliques are the primary movers, they are responsible for spinal rotation — turning your torso to the side. Although the torso rotation movement targets your obliques, several other muscles engage to assist your core and stabilize your torso. These muscles work together to flex, extend, rotate and bend.

Torso rotation exercises can improve movement involving flexion and extension or bending forward and backward. The benefits of torso rotational exercises include increased mobility and strengthened obliques. Using the rotary torso machine will strengthen and tone your oblique muscles, but it will not specifically burn fat off the area you are working. Additionally, stronger abdominal and back muscles take more pressure off the spine. Athletes in certain sports, such as shot put or golf, may benefit from using the Torso Rotation Machine as the exercises improve the strength of their swing.

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