I received valuable help from numerous individuals in the previous thread I posted, so I decided that, because I lack the resources to hire a professional trainer, I'd ask for some advice for a newbie in a unique position: Age: 17 G: Male Height: 5'8" Possible Maladies: 1. Besides jogging 20 minutes a day (which hasn't been consistent), I have little experience working out. Some muscle groups have been completely neglected (I recently found out I rarely use my core after doing 5 crunches and feeling like I was going to collapse :-?). 2. My feet turn out (I'm not quite sure what the medical name for this is, but think of it as the opposite of being bow legged). The result of this is that I can nearly turn my feet backwards, but barely turn them inwards. 3. My right foot is about an inch longer than my left. I'm not sure if this is relevant, but I think it merits being mentioned. 4. My right foot is flat. Same as the above (By the way, I went to podiatrist about my feet and she commented, saying I had "Bionic Legs". Hopefully this is a good thing. I was only 8 and she flaunted me to all of her colleagues). 5. I'm what some may call a "genetic freak". I lifted a 5 pound weight for the last 2 weeks casually for about 40 cumulative reps a day and doubled the size of my biceps. No changes in diet during this. Frightened, I immediately dropped the weights and posted a thread on TW forum. I've vigorously looked through the great interwebs, but a lot of the info I found was conflicting and may not pertain to me (or tennis for that matter). Any exercise suggestions that won't strain my feet/make me bulk up to the point where I can barely move/?