Related Clues:

• Lumbar spine flexors
• They can be found next to six-packs
• Six-pack to be proud of
• Skeletal muscles
• What sit-ups work
• They're below the pecs
• Core muscle group
• "Crunched" muscles, briefly
• Muscles worked by bench presses
• "Crunched" muscles
• Bench-pressing target
• Pilates target
• They might be ripped
• Torso muscles, briefly
• Stomach muscles (abbr)