What's the Name of That Book??? discussion

This was a scifi story I read when I was a teenager.
The main character starts as an unpleasant, fat, and unattractive man. When we meet him, he is allowed to have sex with prostitutes for free because he has "clean genes". The prostitutes harvest his sperm for a government genetics program. I think most men have damaged sperm? He is not a very pleasant character.
He suffers a fall from grace of some sort. Slavery, or kidnapping perhaps? He is sold? into a gladiator-type school where he is trained.
As the main character is being trained, he goes through painful physiotherapy to shape his fat into muscles.
The story includes scenes where the main character sees old people wearing video glasses that record criminal behavior - this is the part I wish to reread.
I seem to remember mention of a large building of some sort in the final stages of the book, and perhaps an aerial assault.
The book was written before 1990.

Thanks!

Radix by A.A. Attanasio. Did you post about this book before? I answered another post with this same suggestion a while ago.

Nope, never used this Goodreads feature before.

I have had a look, not sure 100% that it matches my criteria but will read it this week. Thanks for assisting.

I finally read this one and it is nearly what I remembered, so I will be happy to mark this "solved" for part of my search. The following part, which I was specifically looking for, still remains unsolved. this scene did not exist in the book. Do I open another request on the following?

"The story includes scenes where the main character sees old people wearing video glasses that record criminal behavior - this is the part I wish to reread."