To increase thoracic flexibility and core strength these big balls are unique in their usefulness and and portability, I advise every SRV to get one :)BIG BALLS. We're talking about fitness balls, those big blow-up spheres that can be used to perform an almost endless amount of exercises for every body part. If you've wanted to try out a fitness ball, but have never known what to do, here are SRV fitness ball exercises to get you started. These exercises will give you flexibility in your spine and strengthen your core, Get SOME.
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