Add Yahoo as a preferred source to see more of our stories on Google. The commando plank — moving from high to low plank and back again — is a shoulder and core exercise I love to program, but I haven ...
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How fitness icon Erika Rischko, 86, uses a Bosu ball to keep her core strong – 6 moves you can try
The instability challenges her core and balance. Here are the six moves she uses – including beginner-friendly variations ...
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