Bird dog

Purpose:  This is a core stabilization as well as a balance exercise.

Instruction: On your hands and knees, extend one arm and the opposite leg making sure not to loose your core engagement or arch your spine.  The height of your leg is not important as long as you can maintain good core stability.

Common Errors: Twisting at the trunk or arching your back indicative of  poor core control, and weakness of the abdominals, obliques, and glutes.