Sorry to all attack men on the forum, but the saying for them is "All glory no guts".
Middies have to run, play some defense, etc. They still score, but they also do other hard stuff. If you ay your in shape and fit then middie would be great for you. you can handle the running and you will get yourself further in your lacrosse life. Not because Middie is a better position or anything, but because your in shape, fit, etc. and will not get tired come the 4th quarter.