How do we make our hair have più weight? u know what i mean, hehe. Help me, thanks!

Well, I have a big forehead, and i look really ugly, like a bald girl, without bangs. Since my hair is light, and no weight, sometimes when i run, jump, and do active stuff, my bangs open up, o asundered to left and right side, and it looks even worse. I tried on weighty shampoos but doesnt' really help. Help me!!! Thx