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Old 03-01-2007, 10:15 AM   #2
Roger Harrell
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Join Date: Jun 2004
Location: San Rafael  CA
Posts: 2,318
Swiss balls are fine, but they are not the "core miracle" that marketers would like you to believe. There's just a ton of other things you can do to strengthen your core. Lifts like the OHS require active controlled stabilization as there is a large load on the end of a long lever. This generates a fantastic stimulus while concurrently working other things. Crunches on a swiss ball are just a bit inefficient.
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