Little niggles in the form of shin pain, sore arches, or aching knees may be a sign that you're not getting the support you once were from your favourite running shoes.
Likewise, if the midsoles and outsoles are compressed or worn - it may be time for a new pair.
As shoes age, the shoes lose the ability to absorb and withstand shock, to provide your body with adequate cushioning, stability and support, which increases the stress and impact on your joints and your overall risk of overuse injuries.
But how do you know when you should replace your running shoes?
I advise runners if they are sitting on the fence and not sure when to replace their running shoes, to go into a local shoe shop and try on a new pair of the same shoes they've been training in, next to the old ones.
If the old favorites feel flat and "dead" compared to the new ones, there you go - time for a new pair. The best way to tell the difference is to feel the difference.
Numbers wise, a good running shoe should last 600 to 800 kilometres (three or four months for regular runners).
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