RE: Post HIIT Nutrition
Again, please forgive me if I have completely misunderstood as I am very much a layman on the topic.
As I understand it, it is very difficult, even impossible for people within the weightlifting/gym realm to ever fully deplete their glycogen stores and in fact that is what marathon runners refer to as "hitting the wall".
On a bulking cycle, supplementing with fast-acting carbs PWO will help to top up glycogen stores quickly, ensuring that any protein you've taken can concentrate on building muscle, however it isn't necessary. The additional calories do help to make sure you're adding weight though.
On a cutting cycle however, the additional calories can impede your desire to lose weight and it isn't necessary to top up partially depleted glycogen stores to prevent muscle loss.
Please correct me on anything you think I may have gotten wrong!