Inner sole
If you had bought shoes of poor quality at least once, you could have noticed that the inner surface of the sneaker had sagged over time and even something like cells appeared on it. That means that the shoes do not have proper cushioning. Imagine how such a sole puts pressure on the foot during a run. Thus there should be a good layer of foam inside the shoe, but not too high. Otherwise, it will be uncomfortable to run.
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Why We Choose the Wrong Footwear#healthScore0Rank#3
If you had bought shoes of poor quality at least once, you could have noticed that the inner surface of the sneaker had sagged over time and even something like cells appeared on it. That means that the shoes do not have proper cushioning. Imagine how such a sole puts pressure on the foot during a run. Thus there should be a good layer of foam inside the shoe, but not too high. Otherwise, it will be uncomfortable to run.