Fit
Ill-fitting shoes can cause blisters and injuries to even the most experienced runners. To find the perfect fit, make sure to leave a bit of space, usually about half a centimetre, at the big toe to allow your foot to swell as you warm up. Also, make sure your heel does not slip out of the shoe as you walk or run. You shouldn't have to tie the laces too tight to keep the shoe on your foot. The laces should be tight enough to feel secure, but not so tight as to cut off circulation. If you have wide feet, look for shoes that come in wider sizes. This is often designated with a letter D or 2E in women's shoes and 2E or 4E in men's shoes.