I've recently had to cut back my training trime- not the length of sessions per se, but overall weekly volume. After working back into things following my surgery last September, by June I was training 3 times a week, and my poundages were back up to my normal range. This, 7 months after starting back with weights that would barely challenge a teen girl on her bad days. After FINALLY receiving the equipment I had bought off Ebay and starting my garage gym; consisting of 7 Nautilus pieces, a Universal pullover, a vertical leg press and a short power rack, along with an O bar, and over 750 lbs in plates, including 4 100's, I trained 3 times a week still, until the combined drain of this, plus working my butt off in my PsyD program, and additional assorted other stresses kept me in a perpetual state of trying to recover. I finally gave in to the sense of perpetual fatigue, took an additional 2 days off after my second workout of last week, and in yesterday's leg workout, went up on every set, including getting 395 for 10 strict, slow reps on the Nautilus leg extension. Going for contractions rather than sets or reps, though I got up to 62 reps on bench situps holding a 25 lb plate before having to terminate the set. Squats are back up to 475 for 8 and other exercises were all PRS. I can't agree that 45 minutes to an hour isn't PLENTY if you work hard.