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  1. #1
    Keto Maven Stonecoldtruth's Avatar
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    45 degree leg press sled.. HELP for reps

    Ok guys, so I have a question. For my leg pressing I use the 45 degree leg press sled, which looks like this:



    Not the same brand, but you get the point.

    Today the gym director asked me what my Leg Press was up to (I don't do squats/dl at the moment due to an RC injury) so I said 18 plates or 810lbs. He asked if that was before/after the weight of the sled. I looked, puzzled, at him and asked what weight? He said that the sled weighs an additional 120lbs. I didn't believe him so I called Push, Pedal, Pull (they service all the gym equipment) and said the sled portion does weigh an additional 120lbs.

    NOW, do you think that is/should be added to the weight (of plates) that I'm pushing?

    Any reasonable answers will get reps.

    Thanks,
    Josh
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  2. #2
    Ladies Love Squat Butt Morbid_Mind's Avatar
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    I always add the sled weight. Why not? You're moving it.
    My Goals:

    For to make the heavy weights light and the baggy clothes tight.
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    Keto Maven Stonecoldtruth's Avatar
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    Originally Posted by Morbid_Mind
    I always add the sled weight. Why not? You're moving it.
    Kind of what I thought once they told me, plus it bumps my LP up to 930.. haha, makes me want to break 1000.

    Reps for you!

    Josh
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    Keto Maven Stonecoldtruth's Avatar
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    Could a mod please move this to the exercise equipment thread for me? I didnt' even realize we had one of those *DUCK*

    Thanks,
    Josh
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    Cystic Fibrosis Brah Mike750's Avatar
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    I guess I would add it if I knew what it weighed, but most of the time people don't. You could argue that since you are working on an angle that makes the weight easier, then the weight of the sled offsets the handicap the angle gives you. If that makes sense. I had a hell of a time wording that.
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    Originally Posted by stonecoldtruth
    ......said the sled portion does weigh an additional 120lbs.

    NOW, do you think that is/should be added to the weight (of plates) that I'm pushing?
    Of course you should - after all, you're pushing the additional 120lbs as well as the 810lbs.
    If you're growing, you're training/eating properly.
    If you aren't growing, then you aren't doing the above 2 properly.

    "too much thinking. grab weight and just f**king lift." $AJ answering question about position of shoulders during shoulder presses :D
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    Keto Maven Stonecoldtruth's Avatar
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    reps for you two as soon as I recharge
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    Reggiestored user HoosierBoy's Avatar
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    Makes no difference if you add it as long as you do it the same way every time.
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    Originally Posted by HoosierBoy
    Makes no difference if you add it as long as you do it the same way every time.
    Of course I do it the same way everytime, otherwise ANY changes would be skewed. Silly.
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    grow stronger comrade rockhuddy's Avatar
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    I hate to rain on everyone's parade here, but measuring weight on leg presses really doesn't make much sense in the first place. There are so many factors that differ from machine to machine, such as track angle, sled weight, seat angle, how well the sled slides, etc. And since most people don't know or can't place number values on any of these variables, one person's "1000 lb leg press" could be equal to someone else's 850 lb press.
    "If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen." - Samuel Adams
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    Ladies Love Squat Butt Morbid_Mind's Avatar
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    Originally Posted by rockhuddy
    I hate to rain on everyone's parade here, but measuring weight on leg presses really doesn't make much sense in the first place. There are so many factors that differ from machine to machine, such as track angle, sled weight, seat angle, how well the sled slides, etc. And since most people don't know or can't place number values on any of these variables, one person's "1000 lb leg press" could be equal to someone else's 850 lb press.
    Measuring for logging purposes makes complete sense.
    My Goals:

    For to make the heavy weights light and the baggy clothes tight.
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    Keto Maven Stonecoldtruth's Avatar
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    Originally Posted by rockhuddy
    I hate to rain on everyone's parade here, but measuring weight on leg presses really doesn't make much sense in the first place. There are so many factors that differ from machine to machine, such as track angle, sled weight, seat angle, how well the sled slides, etc. And since most people don't know or can't place number values on any of these variables, one person's "1000 lb leg press" could be equal to someone else's 850 lb press.
    However, seeing as I consistent foot positioning and range of motion, on the same sled, it makes perfect sense for me to measure the weights. *shrug* And I don't think it is bad for me to have a goal of 1000lb leg press, that is just something I thought would be a neat milestone for me. So you didn't rain on my parade, just came off as somewhat of a terd.
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    Steven Proto ExtremistPullup's Avatar
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    does anyone know what a lever leg press plate weigh

    Last edited by ExtremistPullup; 03-18-2006 at 07:52 PM.
    Pullups Max reps: 40 reps
    Max weighted pullup:
    206.2 lbs x 1 rep
    165 lbs x 6 reps
    135 lbs x 8 reps
    100 lbs x 14 reps

    Bench: 365 lbs
    Squat: 405 lbs
    Deadlift: 505 lbs
    Press:225 lbs
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  14. #14
    Ladies Love Squat Butt Morbid_Mind's Avatar
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    If you know the brand name you can check on their website. Most will give you the weight of the sled.
    My Goals:

    For to make the heavy weights light and the baggy clothes tight.
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    grow stronger comrade rockhuddy's Avatar
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    Originally Posted by stonecoldtruth
    However, seeing as I consistent foot positioning and range of motion, on the same sled, it makes perfect sense for me to measure the weights. *shrug* And I don't think it is bad for me to have a goal of 1000lb leg press, that is just something I thought would be a neat milestone for me. So you didn't rain on my parade, just came off as somewhat of a terd.
    Nah, I've got no problems with leg pressing, and of course it's important to progress in weight for any exercise, therefore recording weight for yourself is important. I just wanted to point out that different people using different equipment comparing leg press weight will not yield accurate conclusions. Sorry if I came across as a dick, I was in a hurry and didn't think to finish with a witty remark or perhaps a smiley.
    "If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen." - Samuel Adams
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    Keto Maven Stonecoldtruth's Avatar
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    Originally Posted by rockhuddy
    Nah, I've got no problems with leg pressing, and of course it's important to progress in weight for any exercise, therefore recording weight for yourself is important. I just wanted to point out that different people using different equipment comparing leg press weight will not yield accurate conclusions. Sorry if I came across as a dick, I was in a hurry and didn't think to finish with a witty remark or perhaps a smiley.
    No worries bro! I come across as a terd over half the time I post, ie the name stonecoldtruth.
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    thats alot of weight bro nicejob!
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    Scientist at large Andrew99's Avatar
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    I think you have to multiply the total by the cos of the angle anyway as the weight is not being redirected by a cable. The 1000 lbs is down and you are pressing at 45 deg. You are probably only pressing with 700 lbs to move that 1/2 ton.
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    Originally Posted by Andrew99
    I think you have to multiply the total by the cos of the angle anyway as the weight is not being redirected by a cable. The 1000 lbs is down and you are pressing at 45 deg. You are probably only pressing with 700 lbs to move that 1/2 ton.
    Wouldn't it be harder to move the weight UPhill though? That doesn't make sense to me here.
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    Originally Posted by stonecoldtruth
    Wouldn't it be harder to move the weight UPhill though? That doesn't make sense to me here.
    Think of it this way - if the sled were perfectly frictionless and horizontal, you would need no force at all to move it. If it were vertical (assuming your body could bend that way) you would need 1000 lbs to move it. Everything else is in between. You get the maximum resistance when you work directly opposed to the line of gravity (which is straight down). The component of what you are moving is the vertical component of the force only. The only exception is when you have a cable-based machine which redirects the force with pulleys so that it is not straight down.
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    Originally Posted by Andrew99
    Think of it this way - if the sled were perfectly frictionless and horizontal, you would need no force at all to move it. If it were vertical (assuming your body could bend that way) you would need 1000 lbs to move it. Everything else is in between. You get the maximum resistance when you work directly opposed to the line of gravity (which is straight down). The component of what you are moving is the vertical component of the force only. The only exception is when you have a cable-based machine which redirects the force with pulleys so that it is not straight down.
    Couldn't that be the reason that the sled itself is based? To offset the fact that it is not purely vertical?

    We don't have a vertical leg press at our gym, so I shall have to suffice.
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    Originally Posted by Andrew99
    I think you have to multiply the total by the cos of the angle anyway as the weight is not being redirected by a cable. The 1000 lbs is down and you are pressing at 45 deg. You are probably only pressing with 700 lbs to move that 1/2 ton.
    LOf'nL This is what happens when a thread sufficiently resolved in Post #2 continues on for 20 more posts. "Multiply the total by the cos of the angle." That is classic stuff there.
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    Originally Posted by stonecoldtruth
    Couldn't that be the reason that the sled itself is based? To offset the fact that it is not purely vertical?

    We don't have a vertical leg press at our gym, so I shall have to suffice.
    The angle is set for a reasonable body position. A vertical leg press would be near impossible to use without injuring your back. Look at the weight. Its just hanging there on the bar; the force is straight down. What you are pushing is the cosine of the angle times that weight. This is a big part of the reason you can leg press a whole lot more than you can squat.
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    Originally Posted by Andrew99
    The angle is set for a reasonable body position. A vertical leg press would be near impossible to use without injuring your back. Look at the weight. Its just hanging there on the bar; the force is straight down. What you are pushing is the cosine of the angle times that weight. This is a big part of the reason you can leg press a whole lot more than you can squat.
    *nod* That makes sense. My squat needs to be update in my sig, but it isn't much different than before. I had thought most of the difference was due to required stabilization in the squat, which I'm sure still attributes, but I guess the entire math part makes sense too.

    Thanks man, I think that about wraps this thread up.. time to let it fade!
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    Originally Posted by Andrew99
    The angle is set for a reasonable body position. A vertical leg press would be near impossible to use without injuring your back. Look at the weight. Its just hanging there on the bar; the force is straight down. What you are pushing is the cosine of the angle times that weight. This is a big part of the reason you can leg press a whole lot more than you can squat.
    Eh, That still won't stop me from leg pressing and bragging about my 1100lb press for reps.

    I mean ****, it may be at an angle and there are mathematical factors that must be considered, but that is still a heck of a lot weight to be pushing, and my thighs get a workout on leg press better so than squats (which I do still love, since they work my core as well)

    (tangent rant ahead) The leg press isn't to be shunned, regardless of how squatting is *better* for you.
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  26. #26
    Registered User FarEastBeast's Avatar
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    Originally Posted by MoGeaYuglay
    (tangent rant ahead) The leg press isn't to be shunned, regardless of how squatting is *better* for you.
    Both work very well together. Hack squat machines are good too, though I don't currently have access to one. Barbell hack squats are very good though too.
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  27. #27
    Cystic Fibrosis Brah Mike750's Avatar
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    On one side of it, it can't hurt not knowing the weight of the sled especially since when you go to the gym it's always the same one so it cancels itself out so to speak. If you add more weight to get the reps you need, you went up in weight period regardless of the sled.

    I could see an issue if you ended up switching gyms frequently and had to keep adjusting for the different sleds, but how many people actually end up doing that?

    BTW, how many of you go by "the rule" that you only add wheels (45 lb plates) to the leg press? I usually do, but if I have to get a certain rep number (like on my 3 rep days), I may have to add smaller plates because I'm trying to get a certain number and when reps get that low one plate could mean the differece between, say, 5 reps and 1 rep.
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    Originally Posted by Mike750
    BTW, how many of you go by "the rule" that you only add wheels (45 lb plates) to the leg press? I usually do, but if I have to get a certain rep number (like on my 3 rep days), I may have to add smaller plates because I'm trying to get a certain number and when reps get that low one plate could mean the differece between, say, 5 reps and 1 rep.
    Wait!!! You mean there are plates other than 45s? Hehehe, I usually only go by # of 45s unless I am aiming for a # goal. Like when I hit 666, that required some smaller weights, and a 16oz water bottle on the sled.

    Josh
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