While the impacts of differences among types of footwear may be minimal on a single run, the cumulative effect on performance and health can provide a competitive edge.
For speed workouts, often held on tracks, lighter shoes with less cushioning and support may be used.
Racing shoes are lighter (around 5 ounces) and have 4-6 spikes or "pins", which help with traction on hills and wet terrain.
They have less cushion than trainers, are less supportive, and often utilize a springy spike plate made of rubber or Pebax.
In more recent shoe technology development, a carbon plate has been incorporated into the design of spikes.