Well I'm a tall guy (192cm/6'3") and 38, with back problems on both sides of my family, but so far mine is holding up well. I think my yoga certainly helps, as I got my 65-year-old dad to to a dozen salutes to the sun each day for his back, which has given him trouble on and off for a the last 2 or 3 decades, and his problems have cleared up.
But yeah the good herb is excellent for aches and pains too. And I get the feeling it's good for all kinds of ailments. Last week I came down with what felt like the beginnings of the flu (for the first time in at least 5 years) but it only lasted a day and a half. I was feeling a bit shaky one evening, and the next day I was feeling icky, achy and shivery, so I got well vaped for the day and relaxed. Next day, all gone.