@@Vl0gWithAb no shit Sherlock, but it doesn’t weigh nothing so it counts, to count it for one exercise and then not count of for another is daft 😂. But thanks for your input, you get a gold star.
No, the best way to get gains as a beginner is getting stronger, it’s an easy way to track progress and progressively overload for anyone. The weight absolutely matters. No one is getting big legs with only one plate per side or even only the platform.
Good quick video explanation. Two points: Use a phone level app to get actual rail angle. Most sleds will list its weight. Total moving mass along rails multiplied by Sin of rail angle.
I always say 71% or cos 45. Where it gets wonky is when people use the horizontal leverage leg presses. Those things are 50% because they have 2 hinges so the weight moves half the distance the legs move. Conservation of energy means half the distance half the force.
Yep, whenever the weight stack is attached to a pulley through which a cable travels (the cable is then anchored at the top of the machine, not directly on the stack) you are lifting 50%. (Same idea with the half the distance of travel, just more broadly applied to any machine with a pulley layout like that)
@@Meep-oc4di Yeah thats called a load bearing pully. 1 pully just assures that 100% of the force works in the direction of motion. You can lift at different angles where as free weights the direction of the force is only straight down. The second pully halves the force needed to lift the weight.
Doing long length partials at the bottom with just three plates or a short bottom pause can be so intense, that it’s almost like the weights are almost irrelevant. I usually take it as deep as the machine can go.
Honestly it’s called lifting weights, just go in there and lift like a caveman as long as there is sufficient time under tension with reasonable resistance the number doesn’t matter
I believe in the horizontal leg press it will come down to the pulley system. 2:1/3:1 etc or if there is a cam to see where the moment is more and where its less and in the case for a vertical leg press it will be sin of 90° which is basically 1. So 100 would be 100. Am i right?
Wait soo 1300 for 10 reps how much is that really and what could potential be my one rep max on here?? I looked it up and it says 1600 I doo do a whole rep it nearly touches my chest
Sine 45? Is that right? Idk, I think it’s about 50% of a real free weight. So 300kg on a leg press is about 150kg on a squat free weight I think. Except the leg press machine is going to be easier still bcos it’s on rails so you don’t have to balance it. So maybe about another 20% easier still. So my guesstimate is that the leg press weights are about 70% easier than free weights.
Great question. Depending on the type of horizontal leg press you’re referring to the math becomes more involved due to the translation of the Weight through any pulleys or cams the particular piece of equipment may use in order to move the weight. This would be different for every brand of horizontal leg press as they may use different size pulleys or Cam’s.
It will depend on whether the machine simply uses a belt going round a few changes in direction to lift a stack, or whether there are cams involved. The trick is to get a friend to measure how far the footplate is moving vs how far the stack is moving. If the footplate is moving the same distance as the stack, you can be fairly sure you are genuinely lifting whatever is on the stack. If however the footplate is moving twice as far as the stack, you are only really pressing half the weight of the stack, just for twice the distance. This can happen with cams or multiple pulleys etc. Of course if you are just using the same machine all the time there is a case for saying just use the weight as a measure of progress; it doesn't really matter what the weight is if you are just using it to gain leg strength for some other sport, eg track cycling. If you were pressing 200 spurious kilos last year but 300 this year, that's still a 50% improvement, right?
don't be sorry, you're the dumb one, but that can be changed. X = Machine you're using, which can be literally anything at various degrees. Sorry to tell you, you're the idiot here.
I agree with this guy. I only count what is loaded I don't count the platform I see the platform as 0.
Do you do the same with bench press? 😂
@@scottconnorzzzzz its not the same for bench press.
@@scottconnorzzzzz 💀
@@Vl0gWithAb no shit Sherlock, but it doesn’t weigh nothing so it counts, to count it for one exercise and then not count of for another is daft 😂. But thanks for your input, you get a gold star.
90lb is Not negligible weight! I did 1130lbs so 800 lbs true weight. Thats ok for 170lbs.
As long as it feels heavy. Honestly getting all worried about numbers is all going to take you so far.
loser
I use it as a pre squat exercise so I can use less axial loaded squats.
I don't know the exact weight, I just know I sharted hard on that last rep.
@@gibbsmlmao
No, the best way to get gains as a beginner is getting stronger, it’s an easy way to track progress and progressively overload for anyone. The weight absolutely matters. No one is getting big legs with only one plate per side or even only the platform.
Good quick video explanation.
Two points:
Use a phone level app to get actual rail angle.
Most sleds will list its weight.
Total moving mass along rails multiplied by Sin of rail angle.
Thanks for the tips!
I always say 71% or cos 45. Where it gets wonky is when people use the horizontal leverage leg presses. Those things are 50% because they have 2 hinges so the weight moves half the distance the legs move. Conservation of energy means half the distance half the force.
Yes. Exactly, great point.
Yep, whenever the weight stack is attached to a pulley through which a cable travels (the cable is then anchored at the top of the machine, not directly on the stack) you are lifting 50%. (Same idea with the half the distance of travel, just more broadly applied to any machine with a pulley layout like that)
@@Meep-oc4di Yeah thats called a load bearing pully. 1 pully just assures that 100% of the force works in the direction of motion. You can lift at different angles where as free weights the direction of the force is only straight down. The second pully halves the force needed to lift the weight.
Doing long length partials at the bottom with just three plates or a short bottom pause can be so intense, that it’s almost like the weights are almost irrelevant. I usually take it as deep as the machine can go.
This the way. Although it's very difficult to build strength this way. Great for hypertrophy.
The leg press at my gym doesn’t go deep enough lol
The safety at the bottom gets in the way, it always bumps into it
Great explanation. Thanks.
Thanks Taz!
Unreal video. This was perfect.
Why does no one use a floor scale to figure it out? Put it in between your feet and the foot platform.
If sine is equal to opposite divided by hypotenuse then in your case, why is it multiplied? I’m getting sin(45)=180/hypotenuse
Phenomenal video
Honestly it’s called lifting weights, just go in there and lift like a caveman as long as there is sufficient time under tension with reasonable resistance the number doesn’t matter
I believe in the horizontal leg press it will come down to the pulley system. 2:1/3:1 etc or if there is a cam to see where the moment is more and where its less and in the case for a vertical leg press it will be sin of 90° which is basically 1. So 100 would be 100. Am i right?
Or…just google the maker of the leg press machine and see how much it weights unloaded.
My really qst is do i count bouth sides or just one side?? I mean if i put 30kg each side means i'm lifting 30kg or 60kg?
60kg
Wait soo 1300 for 10 reps how much is that really and what could potential be my one rep max on here?? I looked it up and it says 1600 I doo do a whole rep it nearly touches my chest
how much weight did i lift if I didn't pust any weights?
Hahah, 0kg. You're pushing air
it might, but
usually tells you the sled weight on the machine.
Most people would be better if using range of motion progression, rather than weight progression with this Machine.
I guess, but it depends on a person's goals.
You could go range of motion progression and then progress with weights whilst keeping your ROM just as full
Sine 45? Is that right? Idk, I think it’s about 50% of a real free weight. So 300kg on a leg press is about 150kg on a squat free weight I think. Except the leg press machine is going to be easier still bcos it’s on rails so you don’t have to balance it. So maybe about another 20% easier still. So my guesstimate is that the leg press weights are about 70% easier than free weights.
"i think" and he gave you a legit mathematical way to prove it. I dunno, you tell us I guess.
I'd say 33% of a 6-8 rep max is equivalent to single free weight squat max.
How would I calculate for a horizontal leg pres machine
It cant be zero but F s cos theta gives me cos 90 is 0
Great question. Depending on the type of horizontal leg press you’re referring to the math becomes more involved due to the translation of the Weight through any pulleys or cams the particular piece of equipment may use in order to move the weight. This would be different for every brand of horizontal leg press as they may use different size pulleys or Cam’s.
It will depend on whether the machine simply uses a belt going round a few changes in direction to lift a stack, or whether there are cams involved. The trick is to get a friend to measure how far the footplate is moving vs how far the stack is moving. If the footplate is moving the same distance as the stack, you can be fairly sure you are genuinely lifting whatever is on the stack.
If however the footplate is moving twice as far as the stack, you are only really pressing half the weight of the stack, just for twice the distance. This can happen with cams or multiple pulleys etc.
Of course if you are just using the same machine all the time there is a case for saying just use the weight as a measure of progress; it doesn't really matter what the weight is if you are just using it to gain leg strength for some other sport, eg track cycling. If you were pressing 200 spurious kilos last year but 300 this year, that's still a 50% improvement, right?
effectively, 0 work is done horizontally. you're only overcoming friction at that point.
Can’t get my head around this pound thing, please incorporate kilos next time.
Just multiply the amount of pounds by approx. 0.45.
For example 100lbs is roughly 45 kilograms
@@rudnums1 I just divide or multiply by 2.2
@@ryanmurphy3011 good on you fam! Seems your method is within 0.1 kg when converting lb's -> kg's, mine is 0.45 off😤😤💜
Silly non-American
It’s easy 1 pound is 3.4 bananas ✌️
Is it necessary to put equal weight on both sides ?
No
yes
Maybe
? 😂
No
Gym math 😂
Gymonometry? I mean math is an umbrella term for various disciplines.
Shitty leg press machine
cool story, bro.
😂😂😂 the conclusion is super dumb sorry
don't be sorry, you're the dumb one, but that can be changed. X = Machine you're using, which can be literally anything at various degrees. Sorry to tell you, you're the idiot here.