has anyone hear has heard or used 6 second abs?
My brother is using it but He wants to know if its effective and is it worth using it?:sen:
How effective is it or should he use different methods for his abs?
has anyone hear has heard or used 6 second abs?
My brother is using it but He wants to know if its effective and is it worth using it?:sen:
How effective is it or should he use different methods for his abs?
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