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Crunches and sit ups are not the best way to get a strong core. This popular topic is an evergreen source of controversy. The statistics are clear, however. It's easy to feel immune before you're hurt. Here are the tips and the supporting research, both personal and academic.
flippingfifty.com/flatabsbetterback
By Debra Atkinson4.5
411411 ratings
Crunches and sit ups are not the best way to get a strong core. This popular topic is an evergreen source of controversy. The statistics are clear, however. It's easy to feel immune before you're hurt. Here are the tips and the supporting research, both personal and academic.
flippingfifty.com/flatabsbetterback

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