Yeah, that working out thing he's thinking about is going about a mile or two over Minako's head. She doesn't even realise that this is an easy way for him to shove the workload onto her - if not just because she thinks it'll be genuinely fun to run around and check tons of places. She has too much energy to begin with.

"Well, it's not really that I necessarily want it.. I just thought you might be busy! I don't want to assume!" Minako is thoughtful when it matters, after all, despite how much of a social bulldozer she can be. "And I don't mind doing it by myself whatsoever."