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Ditch crunches and situps:…
Ditch crunches and situps: How to work those core muscles safely
May 29, 2017, 4:34 PM
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Personal trainer Fairfax Hackley says situps and crunches aren't an effective, or safe, method to work those abs. He has tips to more effectively target your core muscles.
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– Fairfax Hackley, personal trainer
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