Even if you are running on a day without rain or snow, your feet will still sweat. This sweat will transfer to the inside of your shoes and the lining, etc. will get wet. If it is a rainy or snowy day, you have wetness happening on the inside and the outside. Having another pair to wear on your next run will give your shoes time to dry out before you wear them again.
During your runs, the foam in your running shoes will compress with the strike of your foot. Not allowing enough time for the shoes to decompress, your shoes will break down quicker. In addition to your shoes wearing out before their time, this can also lead to injury if you keep wearing them.
If you have one favorite style of shoe that you like, it’s alright to have 2 pair of them to rotate. You can also run in two different styles – just as long as you make sure that each style is correct for your foot type. This is usually what I do. I wear the same brand, but will have 2 different styles that I rotate.
The general rule of thumb for running shoes is 300 – 500 miles on a pair of shoes. You can keep track of this in your running journal. When I record my run for the day, in addition to my mileage, course I ran, weather, etc., I also write which shoe I ran in. This helps me keep a log of which pair I’m running in each day.
Running shoes are vital to keep you out on the roads running comfortably and without injury. You want to make sure that you take good care of them. Make sure that you are taking good care of them. A good way to do that is to give each pair a day off – even if you don’t take a day off!