Although, Nike has added roughly 6 times more to its top line compared to Under Armour since 2015, Under Armour's growth has come at a much faster rate than Nike.
Under Armour's growth has been led by its footwear segment which has grown at an average annual rate of 16.2% thanks to the success of its running and basketball offerings, and the expansion of the footwear offerings internationally
Notably, both companies have continued to outperform the industry. Athleisure has continued to a be a strong driver for these companies, led by higher demand for clothing that can be worn to the gym as well as casually. Acceptance of casual dressing at the work place has also been a factor spurring its growth.
With rising awareness of problems associated with obesity and diabetes, demand for fitness activities is likely to increase. This is likely to provide a further boost to the demand for these companies activewear products.
Moreover, global e-commerce business has been the fastest growing business for the companies, with both of them achieving high double-digit growth in their digital business in 2018.