How to Train for a Marathon in 12 Weeks

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By eHow Contributing Writer

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Before attempting this training schedule, you should be able to run 12 miles. If you have any doubts about your fitness, consult your doctor.

Difficulty: Challenging

Instructions

Step 1

Week 1: Run 14 miles one day, do one speed work session one day and run 5 miles on other days.
Step 2

Week 2: Run 15 miles one day, do one speed work session one day and run 6 miles on other days.
Step 3

Week 3: Run 16 miles one day, do one speed work session one day and run 7 miles on other days.
Step 4

Week 4: Run 10 miles on a hilly course one day, do one speed work session one day and run 8 miles on other days.

Step 1

Week 5: Run 18 miles one day, do one speed work session one day and run 5 miles on other days.
Step 2

Week 6: Run 10 miles on a hilly course one day, do one speed work session one day and run 8 miles on other days.
Step 3

Week 7: Run 20 miles one day, do one speed work session one day and run 5 miles on other days.
Step 4

Week 8: Run 10 miles on a hilly course one day, do one speed work session one day and run 8 miles on other days.
Step 5

Week 9: Run 20 to 22 miles one day, do one speed work session one day and run 5 miles on other days.

Step 1

Week 10: Run a 15K or half-marathon practice race. Do one speed work session one day and run 5 miles on other days.
Step 2

Week 11: Run 10 miles one day, do one speed work session one day and run 5 miles on the other days.
Step 3

Week 12: Do a little speed work (about half of your normal workout) one day and jog 3 miles on two other days. Run the marathon.

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