Tracy Anderson's Top Exercises for Flatter Abs and a Stronger Core: This seven-move series, created exclusively for Health readers by Tracy, is part of our 30-Day Core Challenge: Transform Your Butt, Back & Abs. It promises to do wonders for your waistline just in time for summer. #HEALTHxTA | Health.com

Tracy Anderson's Top Exercises for Flatter Abs and a Stronger Core: This seven-move series, created exclusively for Health readers by Tracy, is part of our 30-Day Core Challenge: Transform Your Butt, Back & Abs. It promises to do wonders for your waistline just in time for summer. #HEALTHxTA | Health.com

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