Conquer 13.1 with this 12-week training plan for first-time half-marathon runners

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If you have a few 5Ks and 10Ks under your belt, you're probably thinking about running your first half-marathon. Doubling your racing distance means building endurance by increasing your weekly mileage. Don't be daunted by this!

Try this 12-week training schedule from PopSugar Fitness that adds miles safely. There are cross training and rest days built into the program to help prevent injury. Plus, the long runs are on Saturdays when you have time to go the distance, giving you Sundays to recover. Click here to get the complete Popsugar Fitness training plan!