Add Yahoo as a preferred source to see more of our stories on Google. Samantha Lee/Business Insider Community is a big part of CrossFit, as are wall balls.Getty CrossFit builds strength, endurance, ...

CrossFit athlete Katrin Davidsdottir has trained in both the US and Iceland, where she grew up. Davidsdottir told Insider she found fitness culture for women to be very different in both countries. In ...