Related Clues:
- Washboard muscles
- Crunches target them
- They may be ripped with effort
- Scissor kicks work them
- Rock-solid body parts for a bodybuilder
- Front muscles
- Body parts sometimes compared to steel
- Core components?
- What Pilates may strengthen
- They're used in a crunch
- Scissor kick muscles
- Muscles below the ribs
- Midsection section, informally
- Planking targets
- Beers emptied along with a six-pack?