There are several other core muscles that we should absolutely continue to work with because they will help you to birth your baby (and carry him / her around afterward!). (mindbodygreen.com)
Bracing describes tensing your abdominals and other core muscles without moving your spine. (fitnessandpower.com)
This class fuses both disciplines to help you improve your abs, back and other core muscle groups while increasing your overall strength and flexibility. (momentumfitnessnyc.com)