Ammonia levels increase exponentially as you head towards failure (see figure 4, no, i'm not going to post it if u don't have a subscription): https://www.ncbi.nlm.nih.gov/pubmed/21311352 Also your blood pressure increases enormously when taking a set to failure. For me this is more relevant, training to failure for several weeks has been shown to suppress IGF-1 and testosterone levels while increasing cortisol levels without any benefit to strenth or power development: https://www.ncbi.nlm.nih.gov/pubmed?Db=pubmed&Cmd=ShowDetailView&TermToSearch=16410373
You might want to factor volume and frequency into that equation. The three key variables are volume, frequency and intensity. Intensity is the least forgiving variable. If your intensity is too low, no amount of volume or frequency will make up for it. However, if your intensity is high enough, then volume and frequency can, and actually need, to be limited. Win-win. Anyway, enjoy you volume and frequency. And cortisol. Oh, and your "ammonia study?" Pfft. So you stop a set the instant you start to slow down a bit? Because of "brain ammonia?" Got any more tough-guy quotes you'd like to share?
More like lose-lose. If you train to failure on a set, you are gonna have a hard time doing anymore worthwhile work sets. As the research shows, this means less strength development. So u lose by giving yourself bit too much ammonia on the brain lol (which is bizarrely a win for you!) and furthermore lose by not being able to complete further sets which hinder strength developments. Another study for you: https://link.springer.com/article/10.1007/s40279-015-0451-3 Also forgot to add the study re enormously increased blood pressure: https://www.ncbi.nlm.nih.gov/pubmed?Db=pubmed&Cmd=ShowDetailView&TermToSearch=3980383 All win-win! Pfft to you too!
It's like you don't even read the studies you posted. The non-failure group did not meaningfully increase their strength over the failure group. And that's one probably flawed "meta study" supposedly making your case. I can post several studies to contradict you for each one you post. But why bother, since I already have? As for the blood pressure study, then don't do the Valsalva maneuver. I don't. You know what? Just to be on the safe side, rather than actually lifting weights, maybe you should just look at the hard.
Working out stresses the body. Cortisol is a stress hormone. See how that works? The idea is to manage it with a well-thought-out routine. You can also elevate cortisol levels with volume and frequency. But without sufficient intensity, you'll have little to show for it.
But..um...they still did increase their strength! The point was there's no need to go to failure since there is no benefit and the costs are too high (i.e. increased cortisol, lower T levels, increased ammonia, increased blood pressure). You can rationalize that the benefits are that you only have to go into the gym once a month or whatever but it seems to come at a rather high cost. Yeah if it doesn't support your assertions, then it was a flawed study. Gotcha. I don't recall you posting several studies. Please do so if you can find them.
No, just that the preponderance of studies show better results going to volitional fatigue or failure. I've posted several research studies on resistance training over time in this forum, including meta-studies. Every one of them that touched on the issue of intensity favored going to volitional fatigue/failure; it is the most efficient way to achieve the intended objective. Since you are dismissive about anything I post anyway, I'm disinclined to look for them. Buh-bye.
Anything you have posted (I'll give you the benefit of the doubt) doesn't look at the costs of going to failure. Which are v high. A simple cost benefit analysis says the benefits are negative compared to not going to failure and the costs are very high. Avoid.