I'm a mid-twenties fairly athletic male and I typically exercise on a regular basis. One an average week, I will olympic lift ~3-4 times and play various sports (surf, volleyball, jiu jitsu, etc.) a couple times. But on some weeks when there's a lot going on, I might end up playing sports a lot more and pull two-a-days for maybe ~5 days of the week.
As I start to do this, I notice my body starting to break down because I can't recover in time for the next day, but I also notice that my testosterone levels appear to increase significantly for the week till I crash and have to rest. I've done this enough to know that if I keep going, I get pretty sick and might lose weight or get injured, so I've learned to stop after a while. For the initial phase of my increased routine, I typically have an increased sex drive and a greater desire to "win" at things.
This seemed like it might be my body compensating for my increased activity by increasing testosterone levels to help me recover. What is actually happening in my body?