Most of the stuffs we use have a lifespan, some expires earlier, some expires later. If you don't use them, they may last longer. However, it does not mean that if you don't touch them at all, it will be able to last forever. Yes, I am talking about a pair of shoes.
Let me share with you an interesting experience from myself. Every year during the first day of my annual in-camp training, also known as reservist, many of the soldiers will go to the E-mart to buy a new pair of boots. Their old boots opened up like a crocodile trying to swallow its prey. I always wonder, how is it possible that a pair of footwear loses its use when we only wear them a few days a year?
The truth is every pair of shoes has an expiry date even if you do not wear them. Of course, it does not get worn out due to wear and tear. However, the cushioning would have lost its effectiveness. In this case, it would not be able to provide you with the desired cushioning from the impact when hitting the cold hard ground. This increases the risk of injuries.
However, it is also unlikely that a person buys a shoe and not wear it for years before he or she decides to wear them. So, how can you tell if your shoes is already in need of a change. Here are some tell-tale signs that you should consider changing your shoes.
When the pair of shoes clock about 350 to 500 miles, its time for a change. That's about 600 to 800 km. But of course, rarely people ever religiously count their distances. Therefore, this would help you better.
If you run:
2 days / week -- change once a year
3 days / week -- change every 8 months
4 to 5 days / week -- change every 6 months
6 to 7 days / week -- change every 4 months
2. The outer sole has worn through to the midsole.
3. The midsole doesn't provide support to your feet and collapse under pressure. It may also have longitudinal creases in the midsole.
4. Holes and tears in the shoe's upper
Wearing a pair running shoe that has worn out is as bad as wearing a poor pair of running shoes. Therefore, it is important that you change your running shoes when it is time to do so!