Related Clues:

• Back muscles, briefly
• Muscles to crunch
• Mr. Olympia's pride
• They look very nice when ripped
• Workout target, often
• "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?
• Back muscles