My bodyweight hasn't been increasing, actually, as my goal is to have it slowly go down right now, so I'm not sure why my pull-up performance is going down as well. It may just be some major accumulated fatigue.
Anyways, madcow, I guess I have 2 questions now whenever you get around to it.
1.) (from above) Throughout my training, everything has been showing consistent gains with the recent training I've been doing except pull-ups. For a period of time, they were getting better and I was increasing the weight used on them for a while. Around 6 weeks ago, that exercise began to show regression so I ramped down and have been building back up. Oddly enough, my performance regression on pull-ups is still continuing even though I ramped down. I started decreasing the amount of weight I added each week on the pull-ups, and I'm still unable to perform with less weight what I could with more weight around 10 weeks ago.
Linear progression and deloading has been going great with everything except pull-ups, so I guess I'm asking what exactly is going on here. I highly doubt one particular muscle group of my body has somehow gotten to the point where it requires periodization, so is just a specific part of my body in an accumulated state of fatigue? It seems ramping down was not enough to dissipate the fatigue as my performance on that exercise has been going to crap, so should I start deloading on that one exercise for the next week or 2 by decreasing volume drastically and keeping weight consistent for that deloading period? It's odd to constantly be getting stronger on everything else while pull-ups have begun spiraling downward.
2.) Are there actually plausible studies that show that the length of a workout actually matters? A lot of bodybuilders and other programs say that if a workout lasts longer than 40 minutes to an hour, the entire training session is detrimental to your progress thanks to a major decrease in test levels as well as skyrocketing cortisol levels. Is this actually scientifically verified information?