Run easily for 10 minutes, then set the treadmill at a speed about 20 seconds per mile faster than your best recent 5-K pace. Run three 3-minute repeats at this speed, alternating with 3 minutes of very slow jogging. After completing a set of three repeats and recovery jogs, rest for 5 minutes by jogging. Then run a second set of three repeats and recovery jogs. When finished, run easily for 5 minutes to cool down.
2. The Progression.
Begin with a 10-minute warmup, and then set your treadmill at a speed about 15 seconds per mile faster than your best recent 5-K pace (this new pace becomes your 5-K goal pace). For your first treadmill workout at this pace, run continuously for 5 minutes. Finish the workout with 10 to 20 minutes of easy cool-down running. For each of the next 10 weeks, run the same workout but increase the time you spend at your goal pace by 1 minute per week. At the end of 10 weeks, you should be able to run a 5-K race at your goal pace.
Warm up for 10 minutes, then set the treadmill at your approximate marathon pace. (If you've never run a marathon, estimate your marathon time by multiplying your typical 10-K time by 4.65.) With the treadmill elevated 1 degree, run for 2 minutes at marathon pace, then elevate the incline to 2 degrees and run for 2 minutes. Next return to 1 degree for 2 minutes, but then climb to 3 degrees for 2 minutes.Continue in this manner, raising the grade on every other 2-minute repeat until you've reached 7 degrees (the inclination pattern is 1-2-1-3-1-4-1-5-1-6-1-7). If you feel exhausted before you reach 7 degrees, stop, and don't let it worry you. Try the workout several more times and you'll develop the ability to handle the hills. Finish the workout by running an easy 8- to 10-minute cooldown.
4. The Broderick Crawford.
This workout gets its name from its "10-4" pattern, a familiar phrase to fans of the old Highway Patrol TV series. Begin by warming up for 10 minutes, then run for 10 minutes at your current 10-K race pace. Jog very easily for 4 minutes to recover, then surge again for 10 minutes at your 10-K tempo. Recover for 4 minutes, and complete the workout with 10 minutes of easy cool-down running.By regularly running treadmill workouts like these, you can develop a better sense of pace, increase your running economy and learn to deal with hills more efficiently. Best of all, come spring, you'll be ready to set some new PRs.