Yes, just like the tires on your vehicle, you need to check your athletic shoes for wear and tear. Wearing older, worn out, and/or bald shoes can lead to foot, calf, hamstring and low back problems. Wearing a proper cushy shoe can help with those existing issues as well.
So, short and sweet: Go check the tread on your shoes. Its the FIRST obvious indication you are due for a new pair.
Happy & Healthy walking,