As I understand it, simplistically, HIIT stimulates fat loss because lactic acid builds-up during the sprint. This is metabolised and serves as a substrate in fat oxidation. The increased concentration of substrates in the oxidation reaction, increases the rate of the reaction = increased fat burning.
Now, my question is this:
Given that weight training is anaerobic,(ie. lactic acid build-up) do you think it is possible to perform a weight training form of HIIT? Not a muscle building routine specifically, but a way to train with weights that can produce similar results as conventional HIIT.
In my mind I picture things like farmers walks. I know another member posted that he had experienced fat loss, as well as muscle gain by training in an unconvetional manner doing things like farmers walks and kettlebell excercises. After some consideration, I can only imagine that this type of training involves in some way something similar to HIIT with weights.
Similarly, consider those times when you trained extremely hard with weights, so much so that you almost puked and could barely walk. Now, doesn't that experience sound a lot like the feeling after a good HIIT session?
I would be very happy to hear your thoughts on this. Any imput is greatly appreciated.