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abs master sit up bar,sit ups foot holder with Elastic 2 Suction Cups and Pull Rope Portable Sit Up Assistant Device for Home Workout (grey)Amazon$25.99
SQUATZ Sit Up Machine and Ab Machine - Abs Master Foot Holder with Double Suction - Situp Bar Assistance for Ab Workouts, Sit-Ups & Core Exercises - 661 lbs CapacityAmazonSAVE $12.98
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NordStick Nordic Hamstring Curl Strap The Original Hamstring Curl Exercise for Home and Travel - 5 Second Set Up for Nordic Curl, Sit Ups, Abs, Core Strength Training - 350 pounds - Black/GreyAmazonSAVE $2.80
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8 Weeks to 200 Consecutive Sit-ups: Build a Strong Core by Working Your Abs, Obliques, and Lower Back | at Home Workouts | No Gym Required | (Workout and Exercise Motivation For Men)Amazon$12.99
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,BlackAmazon$11.99
7 Weeks to 300 Sit-Ups: Strengthen and Sculpt Your Abs, Back, Core and Obliques by Training to Do 300 Consecutive Sit-UpsAmazon