yo where are you at? I'm currently playing rugby for Vanderbilt, Mid-South Conference so we might play yall if you're anywhere near us...anyways, like some guys have already mentioned, it's a sport heavily reliant on explosiveness and conditioning. Dont think walking out on the field with a 315 pd. bench press will do you any good. You will still get the shit knocked out of you (ie myself..haha). I'm 5'9" and 195 and I play wing (smallest position on the team - a back slot). Depending on how big you are, I suggest you focus your lifts on squats, back (power cleans and deads) and believe it or not, really work on your shoulders (push press, militaries etc.). In all honesty, training for rugby is not bodybuilding or powerlifting. The best players out there have 27" legs, thick backs and well rounded shoulders for all the non-padded tackling. It is not the barrel chested guys who can't run or move worth shit. So to sum it all up, legs, legs, legs (this will help you whether you're a back or forward), back, and shoulders. I'm not saying dont work your chest out, just remember that playing rugby well is not guaged by 'how much you bench press and how big your arms are.' Sorry for the long post, just excited to see another rugby player on this forum. Feel free to PM me.
peace,
CN