Related Clues:

• Muscles that may be sculpted, informally
• Weightlifter types
• They're strong when ripped
• Planks work them
• Ones with fab abs
• Washboard from working out
• Flat 'six-pack'
• Core components
• Core muscle group, briefly
• Crunch target
• Atlas's disciples
• The pack in a six-pack
• 'Rock-hard' muscles
• Many admire ripped ones
• Muscles worked in sit-ups