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What is the benefit of rotating pairs of running shoes? Does rotating two pairs allow them to last longer than wearing out two pairs sequentially? I wouldn't think that running shoes benefit from "rest" in the same way that welted, leather dress shoes do.
The reason long distance runners use multiple pairs of shoes is to avoid a situation where you have to do a 10 mile run on a brand new pair of shoes.
Most shoes last about 300 - 400 miles. On your standard 18-week marathon training program, you're running about 35 - 40 miles a week, so about 720 miles for the whole thing. If you start off with two pairs of shoes, rotating them in the short 1 - 2 mile long runs, when it comes to the longer runs, you can just alternate.
Then you run the marathon, and just junk 'em!







