http://www.muellercenter.rpi.edu/Equipment/Paramount/Paramount-rotary-torso-instructions-1.jpg

The text:
-Be sure to read all warning labels before using the equipment
-If equipments appears damaged or inoperable do not try to use or fix. Seek assistance.
-Adjust the foot platform so that your hips fit comfortably against the hip.
-Select desired resistance amount.
From the users position reach behind the hippads and select from the available starting positions.
-Keep your hips firmly against the hip pads.
-Place arms between roller pads, grasp handles and rotate at the waist.
-Return to initial position and repeat.

The more often I read that through, the more obviously it seems to be talking about sex X_X

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Magnum opus