clen (or albuterol, or formoterol), as it's an asthma med...but probably not recommended to use during an endurance event
EPO, Blood doping, Platelet Rich Plasma Therapy, GH
I would guess some "cutting" steroids may be good, but again, I would think one would take these leading up to an event, and not during the actual event.
Kind of just making a few (educated?) guesses here...
gw works. no question about it. for what we it its not ideal......but toss in a lot of cardio and its much much differernt. on sites where its about PH's and natty supps the sarms are a huge deal cuz of how well they all work.