The causes of plantar fasciitis are not entirely clear. Risk factors include overuse such as from long periods of standing, an increase in exercise, and obesity. It is also associated with inward rolling of the foot and a lifestyle that involves little exercise.
The Samsung Galaxy S4 is an Android smartphone produced by Samsung Electronics and was first shown publicly on March 14, 2013 at Samsung Mobile Unpacked in New York City.
The Galaxy series includes a wide range of phones in a variety of sizes and price ranges. Other Samsung phones with the Android operating system include the Rugby, the Replenish and the Continuum. The Samsung Ativ line and the Focus use the Windows Phone operating system. The Wave line uses the Bada operating system.