what is HST??

[protobe]

I have no idea what this is and i want to switch up my program in a few months and this sounds very interesting for size gains. could someone please draw up how this is performed ?
thanks
protobe

 

[Cut]

this should help

http://www.hypertrophy-specific.com/

 

[Cut]

and this

http://www.t-mag.com/nation_articles/217hyp.html