When we work out, we want our hair to stay in place and not to worry it will fall on our face.
Tiered pony is an easy to do gym hairstyle, that holds the hair away from the face and neck.
Section your hair from the crown until you reach mid-section of your neck, then tie a band for each section of hair parted.
Tiered pony image source: http://www.mashupcorner.com/fashion-hack-6-attractive-hairstyles-for-gym/