How did this happen?
Well, HIT (or what I like to call "one-set-to failure" training) forces the muscle to grow by pushing through sticking points and building better "mind muscle connection".
Instead of stopping the set right before failure we move PAST the failure by lowering the weight slightly and then keep going.
It's kinda like an extended drop set for each exercise.
Whats even cooler... you only need to do ONE SET.
If I could go back in time I would have done a lot more "one set to failure training".
Even though I got good results following basic multi-set workouts when I was younger, had I known about HIT I probably would have gained more muscle, faster... and with less injuries.
Anyway, there are a dozen reasons why I love lifting like this now, and I'm glad I can pass this wisdom on to my son.
I'm also glad I can pass it on to you.