Testosterone can also stimulate growth hormone responses by increasing the presence of neurotransmitters at the damaged fiber site, which can help to activate tissue growth. (mensquats.com)
Plus, it's worth mentioning that studies have shown that when you increase your Exercise - Induced Growth Hormone Response (EIGR), this ALSO increases the size AND the frequency of HGH pulses released while you're sleeping! (hypergh14x.com)
If I had to venture a guess, I'd have to say that this type of training probably elicits a good growth hormone response as well, due to the large amount of full body work completed in a given time period. (truthaboutabs.com)