Why it's bad to always suck your stomach in - ABC News
Over time, sucking in your stomach can lead to hourglass syndrome, a condition that can cause changes in the appearance of the stomach — and may also affect other parts of the body, writes Adam Taylor.
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Hourglass syndrome': The dangers of sucking in your stomach too much
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Sucking in your stomach for strong abs can lead to 'hourglass
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Why Hourglass Syndrome Is Dangerous
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Sucking In Stomach For Flat Abs Could Lead To Hourglass Syndrome
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Sucking In Is Bad For You (Stomach Vacuums Do NOT Work)
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How Sucking in Your Stomach Could be Bad for Your Health
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Is Sucking In Your Stomach Bad?
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10 Nervous Habits That Hurt Your Health - ABC News
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Sucking In Stomach For Flat Abs Could Lead To Hourglass Syndrome