What is the purpose of a shoe sole?
Typically made of rubber, the outsole is the bottom of the shoe. The outsole provides traction and contributes to how soft or firm the shoe "rides" as well as its torsional rigidity and flexibility. Carbon Rubber – This durable rubber compound makes up the majority of running shoe outsoles.
How do you land when running?
Try to land with your foot as close to flat as possible — too much toe in the air, with a subsequent slap from an excess heel strike is bad for your body and bad for your run. Roll your foot from heel to toe as if your sole were curved like a partial wheel.