1. When running, ponytail is a very simple and easy-to-care hairstyle, which can fix the hair at the back of the head and reduce the resistance of the hair to the head during running.
2. The meatball head is a hairstyle in which the hair is rolled up and fixed on the top of the head. It can reduce the resistance of the head and make the head more stable.
3, short hair can reduce the resistance of the head, because short hair does not sway when running like long hair, thus reducing resistance.