HONEST opinions on the direct mail flyer. Not trying to be foo foo by any means. BTW, The "assessment" typo wasn't me, it was my graphics guy. Luckily they haven't gone out yet.

get rid os the 'Simply' at the start of that sentence, its unnecessary replace the second 'athlete' in that sentence with the word one, in fact remove the sentence
get rid of the 'simply the fastest...' part, maybe the 'turn your body into a machine' bit as well (lthough on its own it may work)...it all makes it look too much like those shady online 'training systems' that pop up
really man, multiple spelling errors, starting two out of the three sentences on it with the same word, way too much in the way of gimmicky catchphrases, pretty poor
contradictory as well, why would i train like an athlete if im not one, are you saying i can become one or just suggesting i can get into shape? maybe add in something along the lines of 'the way the pro's train' or some such
try this:
NO GIMMICKS, JUST RESULTS! (or replace this with the 'you dont have to be an athlete...' sentence if you really like it, or any ONE of the 4 catchphrase's on the flier))
mbf training systems gym
the number #1 choice in personal training
(gym info, free consulting, guarantee etc.)
(maybe add your name and some credentials at the end)