Dude. What the fuck. This is the most neckbeardy, know-it-all condescending bullshit thing I've ever read on here.  I've been lifting for YEARS and am pretty fucking jacked ("jacked shitlord" was my flair on the old site). I know what I'm doing. One and a half hours is pretty typical for my program. I'm running Layne Norton's PHAT, and I'm in my 30's so I need more than 1 or 2 minutes between sets.  Your concern really comes off as douchey.