Breathing is the key to sculpting your abs, says personal trainer

You have to couple it with intense abdominal workouts 

[Kurt Brungardt, Brett Brungardt] on . *FREE* shipping on qualifying offers. The Complete Book of Abs: Revised and Expanded Edition

The Complete Book of Abs: Revised and Expanded Edition

These breathing exercises can help you build six pack abs (Well, kind of)

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[Villepigue, James, Rivera, Hugo] on . *FREE* shipping on qualifying offers. The Body Sculpting Bible for Men, Third Edition

The Body Sculpting Bible for Men, Third Edition

Pilates guru insists breathing correctly can help you get abs

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I'm a personal trainer — this is the best standing ab exercise that also torches your whole body