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Amazon.com : SPRI Ab Mat - Workout Mat Accessory for Abdominal Exercises, Sit-Ups, Crunches, Push-Ups, Core Training, and More - Portable Padded Shaped Mat with Curved Back Support for Toning Abs :
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Amazon.com: BalanceFrom Ab Mat Trainer Abdominal Machine Exercise Crunch Roller Workout Exerciser, Black/Red, Ab Mat (Regular) : Sports & Outdoors
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X Factor Sit Up Bench Curved Adjustable Utility Workout Decline AB Bench with Reverse Crunch Handle for Ab Exercises Red Slant Board with 6'x4' Protective Flooring Mat - Walmart.com
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