Video: Half-Marathong Training 101
Choose Your Workout
Generally, you can use any easy run for a strong-finish session, especially if you're a recreational runner, by starting slowly and concluding slightly faster. "It puts an exclamation point at the end of a run so you feel good about what you accomplished," says Blake Boldon, director of coaching for RunnersConnect in Indianapolis. On longer runs, gradually increasing speed builds confidence in your ability to pick up the pace when you're tired, he says. In interval sessions, starting conservatively is prudent: Go out too fast and you may not be able to complete the workout, says Boulder-based coach Brad Hudson, coauthor of Run Faster from the 5K to the Marathon.
Fuel Up: Find the Best Energy Bars
Set the Pace
Fitness runners should start at an easy pace, no matter the workout. "You should be able to talk easily," says McKeeman. Experienced runners should base speed on a recent 5-K pace, says Boldon. As a rough guideline, for a 20-minute fast-finish run, start 30 to 40 seconds per mile slower than 5-K pace; for a 40-minute run, start one minute to 90 seconds per mile slower; and for hour-plus runs, start up to two minutes per mile slower. For intervals, begin 10 to 30 seconds per mile slower than goal race pace. (Search: How do I know my best race pace?)
Strength Training: Moves That Make You Faster
Turn It Up
Running a negative split involves gradually gaining speed-not hitting the halfway point of a workout or race and then gunning it. Break the distance of your session into segments, and aim to run each one slightly faster. Divide a three-miler in half, a six- to nine-miler into three equal portions, and runs over 10 miles into roughly four parts. By the final segment, you should be running slightly faster than goal pace or at a pace where you can speak just a couple words at a time. If doing intervals, start picking up the pace after the first half of repeats until you're running the final effort 10 to 15 seconds faster per mile than goal pace.
Know Before You Go: How to Pace Yourself
Turn It Up More
If you're targeting a race, practice making the first half of your negative-split runs faster. "Your goal is to decrease the difference between your first and second half by increasing your starting speed until you're running close to an even pace throughout the race-this will maximize your performance," says Boldon. "You need to conserve just enough energy up front-not too little, but not too much either-so that you can finish fast and still PR." Indeed, most competitive runners hit fairly even splits and then kick it into high gear at the very end. Aim for starting five to 10 seconds slower than your goal pace, no matter what distance you're racing, says McKeeman. "Sure, if you're 25 seconds off on the first mile of a marathon, it's not a huge deal," he says. "You only need to make up one second every mile. However, it's going to be a lot tougher to find that time in a 10-K."
More: Don't Let Race-Day Disasters Happen to You!