if you want to look like jean-claudde -van-damme then yeah ur gonna hav to hit the gym. once you hit 16 it is pretty safe to usethe gym but do it under supervision by someone who knows wot they r doin. I started just after my 16th and took it slowly to begin. with a healthy, diet plenty of protien, and a good training regieme u will see great results within a few months. Also training everyday isnt wise. even without extra weight your body is still under stress. it needs time to repair. try training one day, rest the next, and split ur training up as well, e.g arms monday, chest tuesday..... and really pound the muscle till you cant egg out anymore reps. hope this helps.