You’ll need to get down to at least 12% body fat for abs to start showing. “Getting shredded is an approach to losing fat that preserves muscle and enhances definition,” explains Adam Enaz, PT and registered dietician. Shredding means drastically reducing your body fat to show off all your glorious muscles. “Optimizing your calorie deficit whilst being on a weight training program that focuses on progressive overload is key,” says Enaz. compared two groups, one on a 19% (~500 calorie) deficit and another on a 30% (~750 calorie) deficit.