I want to sign my daughter up for an activity she doesn't like but it will benefit her in the future.
Why do you think she won't like it?
She doesn't like physical activities but I think it would be useful for her.
I'm sure you think this activity will help you daughter in the future, but you shouldn't force her to do an activity she won't enjoy. You should tell her the benefits of it and allow her to make her own choice. She will likely be unhappy and won't benefit from participating.
I will take her choice away from her. I'm doing this for her.
Force is never a good way to convince someone. Maybe you can ask he if she wants to do an activity that is physical and fun.