In lieu of great feedback, comments, and inquiries from his previous article, Nike Master Trainer, Giovanni Roselli gives us 4 more new ways to strengthen our Core that aren't crunches or sit-ups.
In lieu of great feedback, comments, and inquiries from his previous article, Nike Master Trainer, Giovanni Roselli gives us 4 more new ways to strengthen our Core that aren't crunches or sit-ups.
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