Nike's ongoing struggles are giving Adidas a chance to keep taking market share from its larger U.S. rival, but the German brand will have to work harder to keep shoppers interested in its key Samba and Gazelle terrace sneakers.

As Adidas capitalizes on the growing popularity of its Samba and Gazelle shoes, the brand is gaining market share from rival Nike. However, analysts caution that the trends longevity may wane, urging Adidas to manage

At half-year results on July 31, Adidas CEO Gulden said the brand was still 'chasing demand' from retailers, but, more than a year into the trend, the Samba won't remain the 'it shoe' for much longer