It is an exercise equipment.It should be called 3 person seated trunk rotation, here is the picture of 2 seated trunk rotation: wwrc.virginia.gov/images/ExerciseEquipment2.jpg Abusive comment hidden. (Show it anyway.)
It should be called 3 person seated trunk rotation, here is the picture of 2 seated trunk rotation: wwrc.virginia.gov/images/ExerciseEquipment2.jpg