Sam: Is Winston going to need exercise?
Florence: No. The hibernation process greatly slows down the loss of bone and muscle. Even if he was unmodified, he'd be fine at the end of the trip.
Sam: Is it too late to join him? If I leave my suit and artificial skeleton outside, there should be plenty of room.
Florence: We don't know how to safely put you into hibernation. Also, even unconscious, spending three weeks wrapped in your tentacles would probably do bad things to his sanity.