Your Most Valuable Possession

Um...just laying here in the bed, half awake, half asleep, thinking about you. I was wondering if you were looking after your most valuable possession: your mind. I was thinking about John Glenn, his space journey and all. They said that when you're in space you lose muscle mass and the body mass and I wondered if there was any end to it. Or whether, if you didn't exercise in space, how long it would be before you were just a head, or a mind ? and have no body or arms. You'd have them but you couldn't use them. I was wondering if if your body mass would drop to a certain level, and then it would stop right there. And keep whatever you needed to use your mind because it would still be working." (30 seconds remaining) "Anyway, I was just pondering that. What do you think about...that? I hope everything is going alright. I may well wake up here in a little while and forget what I was thinking about."