@erinragancooper: The dual track pro is so smooth! And I love how you can alternate your knees so that you can do cardio and core at the same time. The dual tracks make it easier to do single leg exercises to really work those obliques. This one sold out last year around the holidays and it took forever to restock. So grab it while you can. #abmachine #coreworkout #homegymequipment #tiktokshopblackfriday #mompooch