We SD because muscle gets conditioned to the load+volume and accumulated fatigue slows down further progress greatly. There are a couple of ways to progression, at least load or volume. Combination of load+volume is important. Load growth is important as long as one can keep up enough volume. If all this weren't true, I'd do only one heavy set of 5's and go home. This hasn't worked... it worked up to a point. True, I didn't utilize higher rep drop sets at that time, it probably wouldn't have mattered very much.
Sure, when my fitness levels get close to genetic limits. Nothing wrong about that.
No, SD is
NOTHING to do with volume, it explicitly regards load.
In fact, I once chatted w/Bryan w/regards to random moving-house-day I had to do in the middle of my 2nd cycle ever. Long story short, I have to deadlift & carry a fridge up some stairs. One time trip obviously. I asked Bryan how this would affect my cycle and SD into load progression into SD again. He said I should just SD immediately as the tissue had already been exposed to a load beyond my 5RM for deads at the time and I had basically rendered void any potential hypertrophy I might get from progressing through my cycle using those muscles (glutes, bi's, upper back, lower back, traps). The length of that carry was probably 2minutes. How many times? Once. It's
all about load.
You stopped growing because you weren't eating enough and were scared about getting fat (add in pressure from your mother, according to your own words). I don't understand why you continually ignore the studies posted on here, mostly by Bryan, that show the irrelevance of extra volume w/regard to hypertrophy.
For compound exercises such as deadlifts, well-performed squats (ala proper glute activation), full-ROM rows and properly performed presses, a second set (or rather, higher rep count, as "sets" are a nonsensical approach to load application, given you are loading a muscle in order to grow and not a nerve) is entirely justifiable; you're unlikely to cause the same strain and//or achieve the relevant activation on accessory muscles such as lats (for rows), tri's (or even pecs for bad bench form) for presses etc. I agree that 5 reps is likely not enough TUT//work done once load threshold is reached. However, more than 12 is hard to validate, more than 15 harder still. If you merely want to work on form//love lifting then go for it. But for hypertrophy, it's likely that all you doing is conditioning the tissue
more quickly and reducing the ability to grow from a given load before adaptations prevent growth using that load.
I don't warm up that much and I never have problems. I warmup with 135 for 8 reps or so for bench, rows, rdls and similar. For squats, I do 135 for 5, then 225 for 5, then move on to working loads. I warmup with 315 for 5 then 405 for 3 on deads, then move on to my working loads... never had an injury in the gym. Warming up shouldn't be half your workout. Warm up means getting the muscles literally warm, and priming the cns for the movement by doing it with a lighter load. Doing too much of a warmup could in theory cause you to be weaker when you hit your working loads. I find this to be the case for deads and squats with people I've lifted with in the past, when they end up doing 5-10 warmup sets before they even get to their working load.
But doing less of a warmup is not going to cause your 5 RM to be lower unless you are doing no warmup at all, then it might have some effect but I really think you pulled that 85-90% figure out of your ass. You do know that people lift up cars and **** like that during crisis situations all the time right? How is some 120 lb girl suddenly able to out lift Benni Magnusson just because a car fell on her dad's chest? It's because strength is limited psychologically. And if you are dying after your first set of 5 reps with your 5 RM then it is most likely a psychological barrier. This is why I recommend everyone try max singles on deads, squats and bench at least once in a while because it helps you get beyond that so you can learn to truly push yourself. It's just like benching without a spotter. Your 5 RM is lower if you don't have a spotter and aren't benching in a rack with safety bars. Because you psychologically limit yourself.
Totally agree w/all of this. Generally agree re: warmups as well. It's strictly to prime the relevant nerves and increase blood flow to the area. The same reason basketball players do shoot around, footy players do a few kicks at goal and maybe a half-jog around the field before a game etc etc. Furthermore, @ Rihad, there's extensive work into the impact of over-preparing and stretching, and the limitations this creates into performance, in addition to increased risk of injury.
And comment re: psychology couldn't be more accurate.