I work on my feet on a concrete floor all day. Could I really be decompressing while sleeping? Gravity does have 240lbs to work with.
Maybe I'm not insane here's a page from the "Grow Taller Blog" http://growtallerblog.com/how-to-get...hile-you-sleep they claim you can gain as much as an inch while you sleep. Maybe I'll actually measure myself and get some empirical data.