Related Clues:

• Chippendales dancers have nice ones
• Core muscles, for short
• Lumbar spine flexors
• Six-pack to be proud of
• What sit-ups work
• They're below the pecs
• Core muscle group
• "Crunched" muscles, briefly
• "Crunched" muscles
• Pilates target
• They might be ripped
• Torso muscles, briefly
• Stomach muscles (abbr)
• Plank target
• Crunches tone them