How do you do the Rotary Torso (Machine)?

Set the machine's range of motion to one side. Sit with your legs against the padding. Place your torso against the pad and grasp the handles. Rotate your torso through the waist to the opposite side. Return and repeat, then set the range to the other side and work in the opposite direction.

What muscles does the Rotary Torso (Machine) work?

Mainly the obliques, with help from the hip flexors.

Rotary Torso (Machine): how to do it, form cues and muscles worked

How to do it

Set the machine's range of motion to one side.
Sit with your legs against the padding.
Place your torso against the pad and grasp the handles.
Rotate your torso through the waist to the opposite side.
Return and repeat, then set the range to the other side and work in the opposite direction.

Key cues

Legs against the padding
Torso on the pad
Turn through the waist
Switch sides after your reps

Muscles worked

Primary: Obliques
Secondary: Hip flexors

Equipment

Rotary torso machine.

References

ExRx: Lever Seated Twist