Make the most of your running workout by confusing your muscles, raising your energy consumption, triggering the body's adaptive response and raising your fitness level in less time. Run for 25 minutes in 5 minute intervals. Every 5 minutes stop and do five squats. At the end of all that run for 4 minutes straight. Then alternate sprints and slow runs. Go flat out in the sprint. Keep your body moving in the slow run. Add EC and the burn you feel will only get hotter.
Extra Credit: 1 minute rest between sets.