12 Week 5K Training Plan This plan is built for an experienced runner who can handle 55-65 miles per week. This plan incorporates 6 days of running a week on single runs, with 1-2 doubles, and one day off a week. This runner is likely looking to take to step up their training volume and/or intensity to make further progress as a runner. This plan is designed to be 12 weeks of 5K focused training, it is advised to start this plan coming off of a base/maintenance, aerobic development, or ...