Related Clues:

• Muscles targeted in core workouts
• Muscles used in a Russian twist, for short
• Midsection muscles
• Part of the body that crunches work
• When they're ripped, they're strong
• Muscles in sit-ups, informally
• Muscular sextet
• Midriff muscles, for short
• Ones demonstrating strength in crunch time?
• Targets of plank exercises
• They're strengthened by crunches
• They may get crunched during exercise
• Core workout target
• Muscles targeted in Russian twist exercises
• Plank exercise targets