Ergonomically designed and built to engage multiple muscle groups, the  Core Glider Ab Waist Trainer Machine helps you focus and shape your core and body. Featuring a sturdy design and construction that can carry a max user weight of 220 LB, it is durable enough for any core workout. Connect with thecommunity with the free SunnyFit® APP to get tips, advice, and view training videos from our Sunny fitness trainers.