Combining Zone 2 running, goal pace running and sprinting in your weekly training plan can be ideal for developing aerobic endurance, pacing skills and explosive speed.

Sprinting builds muscle mass and strength, can increase your speed, and help tone muscles. Long-distance running may improve your cardiovascular endurance and respiratory system. Which is best depends ...

Jeff Simonitsch of San Francisco runs three times a week, lifts weights a couple more, yet it was sprinting that seemed to make the difference in his fitness game. "[I] started to do it because I ...