World's First Sperm Racing Competitors Talk Trash Before Big Competition

PUT THE 'T' IN TRASH TALK TMZ.com

The world's first-ever sperm race is on deck and it's shaping up to be a heavyweight fight ... with plenty of trash talk on the eve of the main event.

Two young sperm donors, Tristan from USC and Asher from UCLA, are preparing to do battle in Friday's live event at the Hollywood Palladium ... so they joined us on "TMZ Live" Thursday to give us some insight into what it's like being full-blown sperm athletes.

usc ucla live sperm racing promotion 1

Tristan and Asher say healthy lifestyles and diets are key to getting their little swimmers ready for the big race ... and abstinence is coming in to play too ... just like before a big boxing match.

There's a lot of…