[Unfortunately, that is indeed what he means. He's hoping his own movement and body heat will keep the air warm. Nevertheless, Vash leans over, reads the message, and nods.]

That sounds like a seriously nice set up! It'll be good to keep in shape. And maybe I can snag a few weights to borrow for in here!

[He does blink a few times though.]

You mean like a swimming pool? For swimming in? A whole bunch of water just for that? [It's a novelty to him, being from a place where water is extremely scarce. It's definitely a luxury he has never indulged in. Even getting enough water for a bath is sometimes a struggle.]