Casa di tired legs

Monday: 6 miles in between of work and leisure time.

Tuesday: Morning 6 miler added with another 6 miler and core workout (Indiana Elite's) in the evening. Roads are now a big mess and I have to rethink my plan to enjoy mileage for forthcoming Berlin (fun run). After only three runs my hamstrings are getting worse pretty fast. Is it really worth of pushing the envelop yet...?