Stop the sit-ups: A personal trainer says these 4 standing exercises are unmatched at ...

These four standing exercises for deep core muscles will work more than just your abs, and focuses on boosting posture, ...

Fire up your abs fast with this 20-minute core workout – no crunches required

Ready to go beyond crunches, Russian twists, and planks? Try this 20-minute core workout programmed by a trainer for an advanced six-move core workout.