When people run for a long time or walk on a rough terrain, they get blisters on their feet. The main reasons attributed to this irritating skin problem are sensitive skin and the constant rubbing of feet with the fabric of the shoe.
Tying those extra holes in the form of a “lace lock” or a “heel lock” will easily prevent blisters. The lace lock will help to keep the foot seated in the back of the shoe, leaving room for the toes up front.
This will create an extra friction between the lace and keep it nice and tight. There won’t be any need to tight them again and again. You foot will have enough space at the front and then there won’t be any toe or heel smashing at the ends of your shoes.