When runners suddenly find that the sole of running shoes is much thinner than the new ones, it means that the cushioning effect of running shoes is seriously reduced, so it is necessary to buy a new pair of running shoes. Running shoes with poor cushioning effect will transfer more impact force to the lower leg, laying a hidden danger for injury.
A lot of running shoes are made of mesh. If the mesh is bigger and bigger, the upper will become loose. At this time, such running shoes are unable to provide sufficient protection for the foot. If you continue to run with them, the disadvantages will outweigh the advantages.
Slippage of sole
The sole of running shoes has a certain grip effect. If your sole slips when you run on dry ground, it means that the sole has worn seriously and lost the proper grip. This kind of running shoes skids more severely in rainy and snowy days, and the possibility of falling is very high.
Experience plantar fasciitis
There are many reasons for plantar fasciitis. When other reasons are excluded, the reasons for running shoes should be considered. When running shoes are worn out, the protection of the feet is weakened, so the feet should deal with greater impact to make up for the lack of shoes. Over time will lead to plantar fasciitis.