US athletic footwear brands market share 2017 | Statista
Footwear market share of Nike and adidas by region 2017 | Statista
The battle for sporting goods supremacy: Nike vs Adidas | IG Bank Switzerland
Fitness App Market Size 2019 Industry Growth and Business Opportunity by Top Leading Players Fitbit, Inc., Nike, Inc. Grand Apps, MyFitnessPal Inc., ASICS, Jefit Inc., Under Armour Inc., - iCrowdNewswire
Nike - A Secondary Market Analysis (NYSE:NKE) | Seeking Alpha