That 90sec number was purely hypothetical written in the context of time under tension. It's not meant to be a specific guideline whatsoever. If you start doing weird stuff (engaging other muscles) to get to 90s, you're not doing pump sets and if you stop at 90s when you had more in you, then you're not doing Pump sets either. In other words, you can end up missing out on the hitting the muscle with a focus on metabolic stress if you're setting a time based goal. -S
I might not have explained it well that's definitely what I'm doing, just have the timer so I know I'm around that mark. It's only the last week I've managed to get around the 90 secs mark, and I've gone over when I've gone too light
Well, remember that that Pump sets are to be auto regulated - use a technique that fits what you feel you need in the context of that day (soreness, sense of recovery, etc.) and what you've done that week. Lots of guys like to have things programmed out specifically, but Pump sets are really mean to be a point of auto regulation (focused on metabolic stress) within Fortitude Training , rather than a kind of set that follows a hard n' fast kind of set (specific rep range, TUT or what have you). Your call of course. -S