efficiency of walking

babbling

it's like,

Good grief, are you another incarnation of DampMatter?

John

"John Larkin" wrote in = message news: snipped-for-privacy@4ax.com...

message news: snipped-for-privacy@4ax.com...

called

are babbling=20

"footeare", if it's like,

had

Good grief, another troll with another new name making accusations he = can't back up. Fuck off, cunt.

Androcles wrote:

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news: snipped-for-privacy@4ax.com...

news:f21htb$jgk$ snipped-for-privacy@jasen.is-a-geek.org...

babbling

if it's like,

back up.

You're an ignorant cross posting piece of foaming at the mouth trash. According to the Google groups archive John has been around sci.electronics.design since March first, 2004. He has made over 8000 posts with his real nname.

You, on the other hand: Recent Activity: Activity in All 87 Groups -- 2353 messages sci.physics.relativity (1307) sci.physics (746) no.alt.hunder (50) comp.lang.clipper (33) no.alt.katter (21 alt.religion (13) sci.physics.electromag (10) soc.culture.indian (8) comp.ai.philosophy (8) sci.math (8) rec.aviation.simulators (7) de.talk.romance (7) alt.fan.art-bell (6) microsoft.public.mic....programming (6) rec.models.rc.air (6) alt.usenet.kooks (5) alt.webcam.gaycams (4) alt.christnet.philosophy (4) soc.culture.portuguese (4) sci.chem (3) uk.sci.weather (3) aus.culture.gothic (3) alt.personals.fat (3) alt.sci.planetary (3) sci.astro (3) it.comp.os.amiga (2) alt.animals.dogs.col...s.open-forum (2) it.tlc.gestori.fastweb (2) microsoft.public.fr.powerpoint (2) microsoft.public.ch.outlookexpress (2) microsoft.public.excel.programming (2) microsoft.public.portugal.technet (2) comp.databases.ms-access (2) sci.physics.particle (2) alt.personals.gay (2) it.arti.scrivere (2) microsoft.public.fr.excel (2) comp.networks (2) alt.personals.fetish (2) microsoft.public.powerpoint (2) alt.internet.search-engines (2) alt.comp.databases.xbase.clipper (2) comp.soft-sys.matlab (2) alt.sci.physics.new-theories (2) alt.fiction.original (2) han.test (1) alt.personals.bi (1) alt.atheism (1) rec.arts.movies.local.indian (1) sci.geo.earthquakes (1) it.annunci.usato.amiga (1) alt.astronomy (1) no.test (1) sci.environment (1) it.annunci.usato.informatico (1) rec.woodworking (1) alt.comp.periphs.mainboard.asus (1) de.alt.comp.sap-r3 (1) misc.test (1) microsoft.public.outlook.general (1) microsoft.public.fr.office (1) alt.idiots (1) alt.comp.virus (1) borland.public.jbuil...ava.language (1) sci.archaeology (1) microsoft.public.pictureit (1) comp.os.linux.networking (1) microsoft.public.win...ndows_update (1) comp.os.ms-windows.networking (1) alt.philosophy (1) alt.bittorrent (1) sci.med (1) alt.personals.transgendered (1) alt.astrology (1) rec.music.classical (1) it.test (1) comp.sys.amiga.misc (1) sci.energy (1) sci.astro.seti (1) alt.msdos.programmer (1) microsoft.public.win2000.general (1) it.comp.console.playstation (1) microsoft.public.wor...enustoolbars (1) uk.rec.audio.car (1) ott.forsale.computing (1) aus.electronics (1) autodesk.autocad.connectivity (1) all made without a real name. What a lowlife coward.

message news: snipped-for-privacy@4ax.com...

message news: snipped-for-privacy@4ax.com...

called

you are babbling

"footeare", if it's like,

had

can't back up.

Fuck off, s*****ad.

The truth really hurts doesn't it, Queenie? BTW, did you ever find a date on alt.personals.transgendered, or are you so ugly in drag that the other queens won't talk to you? Its really sad that nothing on earth wants anything to do with your queer ass. You really should learn to cover your tracks in the Goggle Gropers Archives, Queenie.

babbling

if it's like,

back up.

Fat transgendered atheist astrologers? Gosh, he sure does get around. But clearly not on bicycles.

I thought maybe he was yet another nym of MassiveProng. He's every bit as wrong and almost as aggressive.

John

message news: snipped-for-privacy@4ax.com...

babbling

"footeare", if it's like,

back up.

He is just another "Dead from the neck up" idiot.

That's 10:1 for the bicycle, except that people usually pedal fast enough - not 3 mph! - that air resistance becomes a substantial fraction of the losses.

And how many caterpillars can make 3 mph?

John

Good answer- I have mucho experience with road cycling, running, hiking, and now rowing, in the outdoors and on the machines that estimate all kinds of parameters like speed, cumulative calorie burn, and peak output power. It is pretty obvious to me that the man made machines significantly boost our ability to travel farther, faster, and longer, when used correctly that is. For example, it's kind of difficult to substitute walking for rowing when attempting to traverse a body of water, and similarly, that boat or bicycle is not much good in mountainous terrain. Of the three methods to be used as a means of improving cardio/respiratory physical fitness, my vote goes to the road bike on the indoor trainer for highest sustained power for longest duration at a constant rate. I can pull 1000W peak on the rower, but it's a jerky kind of repetitive pulsed type of output and relatively slow. You just can't duplicate those kinds of peak powers with hiking unless maybe you sprint at intervals or something like that, but generally you will be carrying a load making that impractical. The OP is sort of correct about the walking inducing more joint impact than the others, you would have to do a 50 miler carrying a 75 pound load to fully appreciate how this adds up. Anyway, forget the leg powered stuff, I'm working on doing a handstand walk for 100 meters, the ultimate in inefficient locomotion.

That's not how cycling is done, it is a rotary motion which means there are no "bam" types of dead stops in the wheels or the legs. Duh, that's why it's called a bi-*CYCLE*. As for the leg motion, the seat height is adjusted so that the knee is fully extended when the pedal bottoms. The leg is used to apply peak force on the pedal only through the last 20o of pedal rotation at the bottom, the remaining portion of the cycle is all momentum. The opposite leg pulls up and is definitely not pushed up by the stroking leg. For most people, a constant pedal cadence of 90RPM is optimal so as to assist the blood return to the heart, change gears as necessary to maintain this cadence.

This may interest you

martin

Muscles "violate" the rules of physics in that they expend fuel to produce mere force, without motion, which is technically not "work." A good part of the effort of walking (and most of the effort of walking on your hands) is such static effort, so is inefficient. A bicycle holds up your butt for free, and almost all of the energy you expend goes towards motion.

And walking downhill is almost as much work as walking on a level or modest uphill. People can't recover potential energy, but bicycles do.

John

Then look at Mag lev trains then - almost no "rolling" resistance, just the air resistance, which unfortunately carries a squared term with respect to speed.

The talk about 'bam your foot stops' is not really helpful because the foot has only a small mass, hence little power is needed to get it moving; most of the mass of the body moves at a fairly constant speed.

I had a look at some websites that claim to give energy stats for various exercises.

If the resting body has a base energy expenditure (power) of 1, walking at pace has a power of 3, whereas cycling would be about 1.5.

I've heard a quote that the most energy efficient means of sustained transport* in the whole of the animal kingdom is a thin person on a bike.

I've heard that too. Thsy also say that man is the fastest animal at long distances. Many believe that early man ran his prey to death. Bipedal locomotion is quite efficient, compared to the rest of the animals. Significant energy is stored and released in the tendons during the stride.

I've seen a graph, and it's something like this:

| * | * | * * human on bicycle | * | * | *

You could try these