Related Clues:

• "Washboard" muscles
• Abdominal muscles
• Focus of an 'eight-minute' workout tape
• ''Six-pack'' muscles
• Rock-hard parts, maybe
• They're hard when ripped
• Gymgoer's pride
• Mr. Universe shows them off
• Workout focus group?
• ''Washboard'' items
• Crunch-time workers?
• Body builder's concern
• They may be sculpted in a Roman chair
• Six-pack
• They're used in crunch time