My training partners during college used to tease me because I was religious about replacing my running shoes. Every 4-5 months, no questions asked, even if the tread was still in tact, Katie would be getting new shoes. Ha. I think part of it stemmed from this fear of getting injured from running in old shoes, but if I'm honest, most of it was the allure of a fresh new pair of trainers.
Still to this day I love browsing our local running store when I'm bored ha. I'm not quite as fanatic as I used to be, mostly because we're on a pretty tight budget, but I still rotate my shoes between 3-4 pairs, and try to replace them after I put sufficient mileage on them. Needless to say, I have tried nearly every running shoe on the market, and friends often ask my opinion on which shoes they should get. Which brings me to my next point: which running shoes really are best? Ask any expert, and they will tell you, it totally depends on your training, your foot contact with the ground (ie pronation vs supination vs neutral), and ultimately how the shoe feels. I like to rotate between 3 different types: an everyday heavier trainer, a lightweight trainer, and a super lightweight racing flat. I thought it might help to break it down by what I'm currently wearing. Maybe this will help next time you're in the market for a new pair!
Currently wearing: Saucony Triumph ISO 2Purpose: every day, well-cushioned trainer. This has been a phenomenal shoe that I've worn primarily for walking, easy miles, long runs, and also running up and down the street w/ the baby monitor during nap time ha.
Currently wearing: Saucony Triumph ISO 1
Purpose: this is the same shoe as above, but an older model . Love!
Currently wearing: Nike Pegasus+29
Purpose: again, every day trainer. This is a super old model, but newer-to-me shoe. I had a gift card to a running store and found these on the sale rack in my size, so snagged them for free! They are a little narrower than I prefer, and a little lighter and more responsive than the Triumph, so I'll wear them for tempos on occasion, as well as easy miles.
Currently wearing: Saucony Kinvara 5
Purpose: tempo, fast workout, lighter shoe with less stability. I wish I could get away with wearing this shoe for every run, because I love it that much. Just not enough cushion for everyday running in my opinion. Probably on my 7th pair of these! They don't last as long as a more substantial shoe like the Triumph or Pegasus above, but they are so light, yet still supportive for longer runs. I replace these about every 200 miles.
Currently wearing: Pearl Izumi N0
Purpose: uber lightweight, ideal racing flat. Straightforward with this one. This is a no frills racing flat with pretty much zero stability or cushion. I wear these in races from 1 mile to about 10k. For half marathons and longer, I'll jump up to the Saucony Kinvara.
Similar shoe to this that I've tried and liked: Adidas adios boost