When the sun’s shining and the mercury is heading toward triple digits, tear up your training plan and take your legs on an adventure. There are no rules or regulations; the only goal is to find the best body of water for submerging yourself mid-run. Maybe that means executing a perfect cannonball off a rock or ducking into chilly waves. However you do it, this is what summer is all about. Make a splash: run, cannonball, run.