Ask the trainer: "I've noticed fitness instructors don't teach sit-ups much anymore. Are they bad for you?" - CampusWell
Sit-Up Trainer | SK1300001000
Incline Decline Sit up Bench Core and Abs Trainer - HomeFitnessCode - US
Amazon.com: SKYKreation Fit Abs Trainer Upgraded New Generation Premium Sit- Ups Bar with 3 Suction Cup + Bonus Resistance Band and Floor Pads - Blue : Everything Else
Sit-up Helper Lazy Abdomen Home Abdominal Belly Portable Lazy Push Up Pull Up Fitness Equipment for Home gym Muscle Trainer - Walmart.com