How to change settings?

Long story short, I bought the game what had to be three years ago, only to drop it in favor of the gym. But I need more varied workouts, so I'm picking it back up again.

Thing is, I don't know where my height/weight is listes. You're supposed to put that in, right? I'm worried that the information given is outdated and so the little information I get like the calories and difficulty estimates are just way off the mark.