Try Our 5-Minute Abs On Fire Workout

Drawing the knee will focus the work on your lower abs, but holding the elbow plank also works your shoulders and upper back.

• Begin in an elbow plank position with the abs engaged.
• Draw the left knee into the chest. Then step the foot back to the elbow plank position. Now draw the right knee into the chest and then step it back to the elbow plank position.
• This counts as one rep.
• Continue alternating sides and do as many reps as you can with good form in one minute.