hey all.. before i begin jus wanna apoligse in advance if this post or similar post has already been done! k.. im 5'8 weghin around 8.3 stones and 17 yrs of age.. as you've prob relaised im well under weight. so ive decided now that i have dobne my exams at school to gain sum weight and started weight trainin. but the problem is i dont have the slighest idea wer to or how to begin. i have no idea on how many reps or light weights are! i understand i will physcially have to eat alot more, but the trainin side is all a blur. if anyone couuld help me or give any advice on a possible week regime/timetable of exactly which exicrses to do, light weights/ heavy weights number of reps etc ect .. i would b grateful. also wot works for u and wot dosent. i would like to have more mass but not bulky.. more defined.. not to ripped to. any ideas? any information would b grate.. thanx alot... thanks.