I had this crazy idea come to my mind some few days ago: what if you're a guy who has his own squat rack/barbell to himself? Would unracking a 1RM+ barbell, holding it on your back for say 30 seconds, and racking it back, every day, for a few times per day, do anything?
I mean, it could trick your CNS into thinking you're heavier, just like a weight vest would. Now obviously there are a handful of questions arising (is there enough time under the bar to make this adaptation occur? is it too risky on the spine? etc) but I thought it was an interesting experiment to take if someone is willing to do it.
For example, if your squat 1RM is 300 lbs and you unrack a 350 lbs bar 10 times per day (throughout the day) for 30 s each time, you'd end up with 300s of total "unrack" TUT daily, so that' 2100 s each week of having a 1RM+ barbell on your back. That's 35 minutes of stimulation per week with a heavier barbell than usual. Not to mention the core strength benefits.
Again, it comes down to injury risk vs. reward possibility.
well, regardless of whether it tricks your cns into thinking you're heavier or not, dno, but, it would make you stronger in the quads/erectors if you phased it in/out properly, it would definitely make the bar feel lighter.. 10x/day is a bit much possibly, but who knows.. a walkout is not that cns intensive, holding it for time definitely is though.. so there's a variety of things you could do such as hold for time, unrack/walkout/walkback/re-rack, or unrack/rack quickly.
frequency would have to be adjusted based on how you feel, not sure how it would effect jumping, i'd imagine it would very up and down how it effects you... vmo's would probably get really big heh..
#1 thing would be safety, i'd only do it in a rack with high safeties..
you also need some good form gripping the bar, you can't do that if squatting bugs your shoulders in the least.
peace
edit: i like parts of the idea but not the holding for time part, and 10x/day could be too much.. but stuff like that should be effective.