Members SA Rios Posted February 2, 2006 Members Share Posted February 2, 2006 Can any of you math wizzes or physics professors figure this out for me. If I'm 6'4" and weigh 210 lbs. approx how much weight (% of body wieght) am I lifting when I do a push up? I'm having trouble fnding any formulas online for how much weight is being lifted at diffent angles. Just cuious because I mainly work out by doing pushups, sit ups, pull ups, etc. and want to know how much I am actually lifting. Link to comment Share on other sites More sharing options...
Members Mudbass Posted February 2, 2006 Members Share Posted February 2, 2006 Physics schmysics. Calculate it the easy way. Do your pushups on a bathroom scale and it'll tell you how much weight you're lifting. Link to comment Share on other sites More sharing options...
Members L-1329 Posted February 2, 2006 Members Share Posted February 2, 2006 Originally posted by Mudbass Physics schmysics. Calculate it the easy way. Do your pushups on a bathroom scale and it'll tell you how much weight you're lifting. This right here is the difference between an engineer, and an operator. Link to comment Share on other sites More sharing options...
Members birdboy7007 Posted February 2, 2006 Members Share Posted February 2, 2006 Originally posted by L-1329 This right here is the difference between an engineer, and an operator. Its funny, cause its oh so true Link to comment Share on other sites More sharing options...
Members mrcrow Posted February 2, 2006 Members Share Posted February 2, 2006 thats a brilliant answer check it against the principle of moments theorem the problem is knowing where your centre of gravity is... use the scales:thu: Link to comment Share on other sites More sharing options...
Members jetmech727 Posted February 2, 2006 Members Share Posted February 2, 2006 Originally posted by L-1329 This right here is the difference between an engineer, and an operator. Those are words to live by. Amen:thu: Link to comment Share on other sites More sharing options...
Members Deep Bass Posted February 2, 2006 Members Share Posted February 2, 2006 Originally posted by jetmech727 Those are words to live by. Amen:thu: That method works under safe conditions, but does not work well under dangerous circumstances. For example, you would not want those engineers to test a brand new passenger airplane with you as one of the new passengers Link to comment Share on other sites More sharing options...
Members L-1329 Posted February 2, 2006 Members Share Posted February 2, 2006 Originally posted by Deep Bass That method works under safe conditions, but does not work well under dangerous circumstances. For example, you would not want those engineers to test a brand new passenger airplane with you as one of the new passengers But that's how airbus does it. Link to comment Share on other sites More sharing options...
Members Mudbass Posted February 2, 2006 Members Share Posted February 2, 2006 Originally posted by Deep Bass That method works under safe conditions, but does not work well under dangerous circumstances. For example, you would not want those engineers to test a brand new passenger airplane with you as one of the new passengers It isn't the engineers who test it. The engineers are the ones on the ground who say..."oh {censored}" when the plane and test pilot go down. Link to comment Share on other sites More sharing options...
Members hawkhuff Posted February 2, 2006 Members Share Posted February 2, 2006 That measurement would only be approximate and an overestimate. By putting your self on the scale while doing the push up you are also weighting your arms but in the action of the pushup your arms and pectoral muscles are doing the work. You are actually only pushing up the weight of your trunk with the fulcrum at your feet. That said you're technically not pushing your feet up so they too would not be considered as part of the weight. Link to comment Share on other sites More sharing options...
Members jetmech727 Posted February 2, 2006 Members Share Posted February 2, 2006 Originally posted by L-1329 But that's how airbus does it. Something tells me we were cut from the same cord Link to comment Share on other sites More sharing options...
Members Mudbass Posted February 2, 2006 Members Share Posted February 2, 2006 Originally posted by hawkhuff That measurement would only be approximate and an overestimate. By putting your self on the scale while doing the push up you are also weighting your arms but in the action of the pushup your arms and pectoral muscles are doing the work. You are actually only pushing up the weight of your trunk with the fulcrum at your feet. That said you're technically not pushing your feet up so they too would not be considered as part of the weight. Well {censored}. Then cut your arms off, weigh them and subtract from the total. Do I have to think of everything around here? Link to comment Share on other sites More sharing options...
Members BEAD Posted February 2, 2006 Members Share Posted February 2, 2006 Originally posted by hawkhuff That measurement would only be approximate and an overestimate.By putting your self on the scale while doing the push up you are also weighting your arms but in the action of the pushup your arms and pectoral muscles are doing the work. You are actually only pushing up the weight of your trunk with the fulcrum at your feet. That said you're technically not pushing your feet up so they too would not be considered as part of the weight. And since your feet aren't part of the weight, they shouldn't register on the scale... right? If you're doing pushups with your hands on a scale, it should reflect that you aren't pushing up your full body weight... right? It seems like this would be a more accurate method than trying to guess SA Rios' body dimensions as well as posture while performing pushups. Right? Link to comment Share on other sites More sharing options...
Members Rippin' Robin Posted February 2, 2006 Members Share Posted February 2, 2006 "Billy Bob, we's here testing them there new-fangled Arbus jet engines. They wanna know how many pound trust they do, or sumthin'... Just hold the scales up at the hind end and I'll fire it up" Link to comment Share on other sites More sharing options...
Members Mudbass Posted February 2, 2006 Members Share Posted February 2, 2006 Originally posted by Rippin' Robin "Billy Bob, we's here testing them there new-fangled Arbus jet engines. They wanna know how many pound trust they do, or sumthin'... Just hold the scales up at the hind end and I'll fire it up" That's pretty much the way it's done. Tie her down, light her up and see how much tug she's got. Link to comment Share on other sites More sharing options...
Members bassplayinguy Posted February 2, 2006 Members Share Posted February 2, 2006 the real way to do it would involve finding your actual volume of your body, finding the centroid and center of gravtiy then youd have to calculate the force that the earth is excerting on you and the distance you are pushing your self up with, along with the fact that you have elbows so youd have to take into account that there is a pivot which is adding resistance and what not ..... just use the scale to check Link to comment Share on other sites More sharing options...
Members mabus013 Posted February 2, 2006 Members Share Posted February 2, 2006 chuck has the right idea. Do you need to know your push-up weight down the friggin' gram, or it a ball-park estimate adequate? "I need to know my weight RIGHT NOW. In Kilograms." - David Cross. Link to comment Share on other sites More sharing options...
Members Rippin' Robin Posted February 3, 2006 Members Share Posted February 3, 2006 Originally posted by Mudbass That's pretty much the way it's done. Tie her down, light her up and see how much tug she's got. I love a vulgar display of power ROAAAR!!!! Shuddering fuselage, and all... Teehee Link to comment Share on other sites More sharing options...
Members Estebum Posted February 3, 2006 Members Share Posted February 3, 2006 Here's my method... similar to how I went through physics and calculus class by punching in answers to my calculator and working backwards until I got the original problemback. Do pushups until you are totally exhausted, and collapse. Then bench press barbells of decreasing weight from 210 lb until you can do the same number of benches as you did pushups, and there's your answer:thu: Link to comment Share on other sites More sharing options...
Members Ace Of Bass Posted February 3, 2006 Members Share Posted February 3, 2006 actually, you want to include the upper arm in the weight, just not the forearm and hand. so, keep your upper arm by your side, put the scale on a table, and rest your forearm on the scale. then double it for both arms, or if you're a total wackjob, weigh the other arm and add them together. this of course does not account for the elbow, which is acting as another fulcrum. so, to factor this back in, use for same formula you used for calculating pushup weight in reverse. Oh {censored}, you don't have it yet... okay, just weigh yourself on a scale, and maybe it'll read 150 pounds. add in the weights of the forearms...maybe 6 pounds for both. that gives you 156, hypothetically. so, 156/210 is 0.74285, so divide the arm weight (6 pounds) by 0.743 (74.3%), and you'll get 8 pounds, which is a more accurate reading for your arms. Then, you'll add the new arm weight (8) to the old scale weight (150) and you get 158 pounds. Then, divide this by your weight, and you'll get a slightly more accurate percentage....(75.2%). So, just use that simply, easy to use forumla to with your actual scale measurements, and you'll have an approximation of your push-up to weight ratio. Glad to be of service. Link to comment Share on other sites More sharing options...
Members bassguy Posted February 3, 2006 Members Share Posted February 3, 2006 i shoved a fork in a wall socket once...thats the day i realised that physics is my natural enemy Link to comment Share on other sites More sharing options...
Members FunkyNedAvenger Posted February 3, 2006 Members Share Posted February 3, 2006 Psh, if you were serious about it, you would measure the answer in newtons. anyways. newtons III law anyone? if the scale is putting 150 or so punds of pressure to equate Fg then you are obviously applying 150 or so punds of pressure on the scale. Link to comment Share on other sites More sharing options...
Members ToeJamFootball Posted February 3, 2006 Members Share Posted February 3, 2006 Originally Posted by MudBassWell {censored}. Then cut your arms off, weigh them and subtract from the total. Do I have to think of everything around here? BWHAHAHAHAHAHAH!!! Link to comment Share on other sites More sharing options...
Members hawkhuff Posted February 3, 2006 Members Share Posted February 3, 2006 Originally posted by Mudbass Well {censored}. Then cut your arms off, weigh them and subtract from the total. Do I have to think of everything around here? Let's get out the Texas Chain Saw! Link to comment Share on other sites More sharing options...
Members Moody Johnny Posted February 3, 2006 Members Share Posted February 3, 2006 Originally posted by Rippin' Robin "Billy Bob, we's here testing them there new-fangled Arbus jet engines. They wanna know how many pound trust they do, or sumthin'... Just hold the scales up at the hind end and I'll fire it up" http://video.google.com/videoplay?docid=-1309610693318372088&q=top+gear Link to comment Share on other sites More sharing options...
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