Professional level ab/core machineErgonomically and ergonomically designed to target your entire core area, including shoulders, back and lower abs, the machine body is designed to make it easier for the client to shape and not put stress on the back or neck. Stable & DurabilitySeanleecore's Ab trainer is upgraded with a sturdy thickened steel frame, 1-inch thick comfort foam padded handles and U-shaped foam pads for effective knee protection, and a maximum weight capacity of up to 440 pounds to ensure a safe and stable abs workout for most people.