I like that analogy.
Force x cosin is equivalent to OP explaining leg press
Force x sin is equivalent to actual barbell squatting? Or could it be Force x tan ?
Could that be used?
This thread makes much more sense now that we have more info:
- The OP uses machines, rather than compound barbell lifts. I agree I could walk up to a machine, sit down, move the little toggle to a relatively heavy weight, and go at it. I don’t agree I could walk up to a squat rack cold, load it up with 315 lbs, and do full range of motion squats.
- The OP doesn’t distinguish between warming up and static stretching. In fact, it seems that the term “warm up” is a somewhat elusive concept to him.
- The OP has many strength conversations go the way of “Yeah, your deadlift numbers sound good, but how much can you eccentric leg press?”.
- The OP needs peer-reviewed evidence of self-apparent actions. Like “Dude, show me peer-reviewed primary literature that says eating satiates hunger”.
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We went from predators don’t need a warm-up so neither should we to using 80%+ of 1RM on a machine as a HIT Jedi.
God bless T Nation.
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Somebody must teach Rock Science.
An Incline plane (like leg press rails) makes it easier to move stuff than going straight vertical. Instead of all the weight or force on you, some goes downward, supported by the incline plain, or ramp.
It turns out you use sin, not cosine.
Force = Weight x sin of the angle of the leg press
Cosine x angle of leg press tells us how much force the leg press carries for you.
In a barbell squat, I think you just get the full force, or full weight x gravity.
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After calculating the force in N for a 1 meter vertical movement up a 45 degree plain verses a 1.5 meter vertical movement linear plane the angular force is 10x easier or requires 1/10 the applied force to move the same weight.
2000lbs or 907kg load on a leg press is like squatting a 91kg load under the bar in a free squat.
I could be wrong. Been a long time since I calculated force applied, work and angular vector addition…
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if all you care about is aesthetics and not athletic performance, i think working on machines only is just fine. it also explains the 'slow rep ’ thing for your warm ups. Of course that works on machines lol. there’s no danger of a failed rep, and machine work in general is not dynamic.
the movement pattern of a barbell bench press, or squat, or pretty much anything I’m doing is going to require a warm up with lighter weights, as you are acclimating your body to particular neural patterns every gym session. you don’t have to do this on a machine, it’s already forcing you through particular planes.
if you had told us from post 1 that you only use machines, I don’t think anyone would have argued with you.
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We need more barbarians and fewer spellcasters here folks.
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Even math thinks that shit is weak!
Ignoring friction, a 45 degree leg-press would be ~70% of actual load (or half the square root of 2), not really 1/10th, but hell it’s been forever for me too. Since the thread is a total loss we might as well discuss trigonometry and physics at this point.
Edit: sorry, nevermind, let’s not do that.
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Thx for the correction! All good. I was always more interested in the chicks in class than the work…(more barbaric?)
Sort of a fightermage or ranger myself.
@T3hPwnisher
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It’s not too bad when you can’t snatch very much 
I’m pretty sure I could hit 85% whenever because I don’t snatch regularly.
I mean, I can’t hit a full snatch with any weight, aside from maybe a broomstick. so 85% of 0 is 0. Soooooo yea. I can snatch 0 any fucking day of the week. Hell, I can hit 200000% of my max without a warmup!
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I’m suddenly hungry for free pizza.
120+ replies since the last visit, quite the evolution here. All I have to add is that OP should be suspended from analogy use for a while.
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M
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Flame free thread is over there…
A 2,000 broomsticks snatch would actually be very impressive!
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One of the posters asked for numbers/PRs. I asked what numbers. He said any. So there you go
But what you choose as a “lift” gives insight into your training style and philosophy.
If someone asked that to me, and I said “I can do 26 tricep pushdowns with a thick red stretchy band”, that would imply something about my training style. The fact that you know your max of an eccentric leg press speaks volumes as to why this thread has is a classic.
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