Buffing up to Schwartzenegger size might also make a person ineligible, at least for EVAs. The blaze-orange suits worn on ascent and reentry are custom-made (I believe) for each astronaut, but the EMUs (spacesuits for EVAs) are far too expensive for that. They are made in modules, available in a range of sizes, which are then assembled to fit the astronaut. There is a limit to the chest sizes that can be accomodated.<br /><br />I seem to recall reading of one case where an EVA almost had to be cancelled because the astronaut was having trouble fitting into the hard upper torso of the EMU after his chest expanded in zero Gs. And of course there was an American astronaut aboard Mir (can't remember which one) who only barely fit under the maximum height for Soyuz who had a bit of a scare when his spine lengthened in space and he almost couldn't get back into his Sokol suit (custom-built suit for launch and reentry aboard Soyuz). They shoehorned him in there somehow.... <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em> -- The Tenth Doctor, "Blink"</font></p> </div>