We all want simple workouts that deliver results, and that's why the 21-15-9 format has become a staple in high-intensity functional fitness. Originally a CrossFit workout, it involves completing one ...
If ever there was a time to give CrossFit workouts a go, it's now. Jessica Alba and Cameron Diaz are believed to be big fans, and from no-equipment home workouts to doing a CrossFit challenge for ...
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