To grow in length you need train hard best exersize is to carry a heavy bag around 5 of 10 kilo with stretched arm above your head so your spine will stretch while you walking. This will grow strauggyour spine perfect straight in the beginning and only when it gotten straight and painless you can start growing in length just keep on doing that same exersize. Thats how to grow in length also runnng behind a grocery cart can grow you in length if its heavy enough and you push it good enough.