Related Clues:
- Stomach muscles, informally
- Focus of middle management?
- Attendance bk. notation
- Muscles that benefit from crunches
- Flat units in a six-pack?
- Tummy 'six-pack'
- Word on a workout calendar
- Auto safety feature, for short
- Torso muscles, for short
- Contents of some six-packs
- They may improve in crunch time
- They're worked by bicycle kicks
- Pull-down beneficiaries
- Posture supporters
- Pilates targets