Runners warm up prior the Mercedes-Benz Corporate Run in downtown Miami on Thursday, April 27, 2017.
Runners warm up prior the Mercedes-Benz Corporate Run in downtown Miami on Thursday, April 27, 2017. David Santiago dsantiago@elnuevoherald.com
Runners warm up prior the Mercedes-Benz Corporate Run in downtown Miami on Thursday, April 27, 2017. David Santiago dsantiago@elnuevoherald.com

Runners can push other runners to go farther and faster

April 28, 2017 7:32 AM