A core ball is called by many names. Instability Ball, Off-Balance Ball, Swiss Ball, or Engage All Your Core Muscles Ball would be more appropriate. You can find them in the Core Ball section of the Logical Weigh Loss Shop.
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Some of us are motivated by a little competition, or we dreamed of being on a tv show like the Biggest Loser, well now you can create your own weight loss challenge using the weight loss challenge spreadsheet. This spreadsheet has done all the math and shows the participant's weight loss as a percentage of their body weight. Play solo or teams, it all in the spreadsheet.
Go to weightlosschallengesheet.com You lose the weight, we do the math.