This 30 day crunch workout challenge has been designed as a great way to learn how to do the crunch exercise and get super strong abs.

This 30 day crunch workout challenge has been designed as a great way to learn how to do the crunch exercise and get super strong abs.

This 30 day wall sit workout challenge has been designed as a great way to tone up and strengthen your leg and core muscles, by doing a simple exercise once a day

This 30 day wall sit workout challenge has been designed as a great way to tone up and strengthen your leg and core muscles, by doing a simple exercise once a day

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