Foam rolls are just cylindrical pieces of some kind of hard foam. Polyethylene rolls are the most common. Polyethylene is also commonly used in exercise mats. Although the rollers can be found in many different sizes, the most common is the 3 feet long 6 inch in diameter. They can also be found in half the length and there are even some that are flat on one side. There isn’t a huge difference in quality when it comes to these rollers. However, a higher density foam roller may last you longer. The foam can eventually be crushed and deformed after extensive use. Continue reading →