Related Clues:

• 'Washboard' muscles
• Units in a six-pack?
• Workout target, for short
• Muscles
• Sit-up beneficiaries
• They may be ripped on the beach
• Tummy muscles, for short
• Sit-ups sculpt them
• They work at crunch-time
• Six-pack units
• Pecs' neighbors
• They're below pecs
• They're found around six-packs
• Middle muscles
• Exercise targets