Injuries while on AAS

[BJJ]

So today (the 11th) anavar kicked in tremendously.
I never trained legs like today before but also I got a bit concerned regarding not only the dramatic strength increase but mostly by the resistance to effort.

Basically, after 90' of hard work-out (quadriceps, femoral biceps, adductors, abductors and calfs) where I drastically improved the weights, I was not tired, I was starving and I wanted to keep training!!!
Now, I believe I have a little idea of what could be to train while on test/tren .

So, two questions here arise:

1. Is there any clue you can give me to figure out when an injury may show up? like a sudden cramp, a muscolar hindrance...
2. Test levels exhaust after 120' (indicative) while natural and training more is just a "catabolic" waste of time. What about while on aas, in my case oxandrolone?

Thank you