Trt is testosterone replacement therapy, it's replacing your natural testosterone with a naturally attainable level of testosterone.
Hrt includes other hormones like HGH, DHEA, preg, possibly thyroid and some other things. These things would all also fall within the naturally attainable levels
A cruise can be anything that's a lower dose from your cycle. I know people who cruise on 500mg to a gram of test, and it's not limited to bioidentical hormones. A cruise can kinda be whatever you want.
I don't feel it really has a place in the conversation with trt and HRT.
Now that I got my OCD and autism out the way ......
I'm 40. I use a baseline TRT of 150mg per week. I occasionally add DHEA and pregnolone. Sometimes if my break between cycles is going to be short lived, I might cruise on 300 test and some HGH. But typically I just go back to TRT.
I've actually been contemplating running 250-300 test year round in 2026 instead of my regular trt.
Broderick Chavez would call this trt Plus.
My personal opinion is that anyone low testosterone, or someone 35 and older who cycles at all, you should probably go on trt, and look into telmasartin and low daily dose tadalifil. They both have lots of benefits outside of blood pressure and boners.
If you can afford hgh year round, I'd entertain 2-3 units as well