Wicking everything. 32 cool makes wicking underwear, there’s a wicking sweatband with a silicone band to keep it out of your eyes (and something called a gutter that is JUST the silicone band that routes it down the side.

Form fitting wicking undershirts - The more body contact, the better, since you wanted to grab every bit of moisture and wicked away from your skin. But in my case, the sweat drips from my head to the sweat band, goes from the sweat band down to the back of the sweat band, which winds up touching the back of my wicking shirt, which winds up soaking it up, and then the wicking shirt absorbs a bunch of moisture off of me, and then the underwear also soaks up a bunch of the moisture

Now, the problem you’re going to run into is everything is going to try and drip down that clothing to your shoes, and that I don’t have an answer for - but I know the stationary bikes have a fan and I wonder how much air that moves. But maybe you tuck a towel in near the shorts level and that soaks it up, and immediately afterwards it gets washed?