i am just starting hst...i have read a lot of the threads, but i would like to know is it ok if i am doing a basic 3 day a week routine to do my cardio after my workout..and can i do hiit cardio for say 20 to 30 mins..or just moderate cardio..also after the first sd...could i do 12,10,8,5, instead of 15,10 and two 5s....when i first started training many years ago..i did a 3 day a week total body workout .doing 3 sets of 12 10 8. their was no sd after 8 weeks ,but it was simaler to this and that was probably when i made the most gains thats why i am keen to give this a go..cheers