Use the KISS method, Keep It Simple Stupid!<br />Sorry, but theory and genetics only go so far. Sure your body has alot to do with this, but which do you prefer to do? Pick one and go for it. If you train hard for one or the other over years and years, your body will likely develop more into one form or the other anyway. I would think sprinting you would train for explosive, heavy weights, climbing, maybe more aerobic, etc. <br />The laws of physics tell you somethings about it also. If you weigh less, you should climb better, though maybe not for as long. Next time try riding your 30lbs mountain bike up a big hill hehe. You will decend faster, but that isn't the point. The point is that the Tour isn't won't by sprinters or climbers alone, but by endurance and which one requires longer sustained output, ie the Armstrong and Indurain. When was the last day race Armstrong won? There you go!<br />Excel at the one you like, but if you are 225 lbs you will have a better chance as a sprinter. If you weigh 145, you would be a better success as a climber. See, how hard is that? If you hate hills, be a sprinter, if you get some strange pleasure out of them like me, be a climber! <br />What are you going to do, wait until you are in your prefered biological form until you decide you want to climb a hill? : ) just being a smarty pants. but if you hate hills, you prob ain't gonna climb em too well ; )