Just to add on to that a bit, max-stim for rack pulls is another viable option as long as you stay on top of your nutrition and sleep so you don't wreck your CNS and by extension, your immune system. Working up to 15 max stim reps on rack pulls with something around a 3-5 RM load will strengthen up your back nicely. I would recommend you do some metabolic work for the erectors and the general back after this. A few sets of 12-15 rep rows or possibly even some hypers would be a good idea.
Or... just do the rack pulls HST style right along with your other lifts. This is also a great idea. It kind of depends on what you respond best to. When I was a few months in to doing rack pulls, I was doing max 1 RM attempts on rack pulls once a month and doing basically 5s or triples on them the rest of the month. My 1 RM kept increasing month after month. Not sure where my logs are for 2010 but I'm pretty sure I eventually pulled an 800 lb single on rack pulls during my bulk the fall of 2010. About a year after that single, I pulled my first >600 lb dead.
As for starting position, I prefer right about kneecap level or slightly above the knee if you want to focus primarily on the top half, which will hit your erectors pretty hard. Obviously there is going to be an impact on glutes and hams as well, so be warned about that part when programming the rest of your routine. Slightly below the kneecap if you want to focus on that changeover point in middle of the deadlift.
Or... just do the rack pulls HST style right along with your other lifts. This is also a great idea. It kind of depends on what you respond best to. When I was a few months in to doing rack pulls, I was doing max 1 RM attempts on rack pulls once a month and doing basically 5s or triples on them the rest of the month. My 1 RM kept increasing month after month. Not sure where my logs are for 2010 but I'm pretty sure I eventually pulled an 800 lb single on rack pulls during my bulk the fall of 2010. About a year after that single, I pulled my first >600 lb dead.
As for starting position, I prefer right about kneecap level or slightly above the knee if you want to focus primarily on the top half, which will hit your erectors pretty hard. Obviously there is going to be an impact on glutes and hams as well, so be warned about that part when programming the rest of your routine. Slightly below the kneecap if you want to focus on that changeover point in middle of the deadlift.