Sports historians have no clear answer. The current form of football evolved from the 1800s based on rugby and the rules were heavy on a lot of running. My opinion is that influenced the sport and the football word came into origin.
### Instruction: Why is NFL football called football when players use their hands mainly?
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### Answer: Sports historians have no clear answer. The current form of football evolved from the 1800s based on rugby and the rules were heavy on a lot of running. My opinion is that influenced the sport and the football word came into origin.</s>