yes....quite, anavar is infact a ANABOLIC STEROID and can have very pronounced anabolic effects. Despite all the bunk misinformation constantly floating around here about how weak var is, it simply isnt true. Also, as an athlete OP is looking for something mild, 2 much juice will ruin performance/training. Any experienced athlete can attest to this. Oh, i'm sorie...notable exceptions: mister crazy juicing ultimate fighter guy!
Then again, this isnt exactly the best place in the world to receive proper training/cycle advice for an athlete, this ignorance doesnt really surprise me.