Related Clues:

• 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
• Some Bowflex targets
• Trunk supporters
• They look better when they're ripped
• Toning targets
• Core training muscles
• Objects of core workouts
• They get firmer when crunched