[python] Re: Leverarm Python
- From: "25hz" <25hz@xxxxxxxxxx>
- To: <python@xxxxxxxxxxxxx>
- Date: Wed, 7 Nov 2007 20:41:26 -0500
I'm not sure what you mean by "preformance ratio", but it's like this. Your
heart and lungs can move a finite amount of fuel to the muscles in use.
They do not have the ability to fuel both legs at 100%. Using your arms AND
legs further divides the available fuel AND you also have to fuel all the
core muscles as well. That's why using more muscles means less actual power
gets to the ground. It MIGHT be a benefit in a very short duration sprint,
but not for longer duration rides.
> i'm not sure about a word i'm gonna use: "performance ratio" to mean the
> ratio of energy produced against the energy consumed.
>
> you mean it's less efficient regarding the performance ratio? it could
> be so and yet allow for a bigger amount of total energy transmitted to
> the vehicule. Do you understand my point? you could have to eat more
> often to make up for it but ultimately you might go faster and longer??
> I understood that by using your arms, you deprive your legs of some
> oxygen reducing the burning of sugars for each leg and consequently the
> energy and strength of those muscles. maybe you're right. :(
>
> 25hz a écrit :
> > Actually, the more limbs used, the less efficient it gets. The most
> > efficient system is using one leg. The cardio and circulatory system
can
> > keep up with that at max effort. Adding a 2nd leg is less than twice as
> > efficient because the body can't fuel both to 100% capacity. Add arms
to
> > the equation, and there's even less efficiency gain. I think the net
gain
> > isn't even 180% for arms and legs. Also add to the fact that you will
be
> > using a lot more core muscles to stiffen/stabilize the torso to be able
to
> > apply power with the arms, and add to that the decreased efficiency of
the
> > entire system due to the added weight and frictional drag of the extra
drive
> > system for the arms, and you can see why arm and leg systems don't
appear
> > everywhere. In a very short sprint where the body is going anaerobic
> > anyway, the body can momentarily produce more power, but then you still
have
> > to overcome the losses from the more complicated drive train. Over
there in
> > Europe they race on row bikes and bents, but no one ever wins when they
go
> > against leg only bents. That's why :)
> >
> >
>
>
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