Remember being a machinist does not mean machining only. Material, vises, and just about everything else in a shop is heavy. So not only do you have to lean over a machine ALL day but you also have to lift alot. I was a machinist for 23 years and have finally landed a desk job. Im on hydrocodones as I write this. You guessed it! A bad back. Its a great way to make a living and job security is good for an accomplished machinist. So Good Luck.