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Crunch on a Fitball: The Perfect Exercise for Abs
Why Use a Fitball for Your Abs The fitball, also known as a gym ball or inflatable psychomotor ball, is a perfect tool not only for stretching but also for toning the abdomen, glutes, arms, and legs. It can be used for a variation of the crunch, a well-known abdominal exercise: this combination increases muscle […] read more