caloric

Bill Cotton said:

I have a Cateye bike computer, Velo8, on my training setup, that gives
Caloric reading. I am trying to find a constant that I can apply to the same
reading from my gps mileage reading. The first three reading are miles.
Below is days on my trainer at the same time, one hour.
Course Trainer Trainer Trainer Trainer Trainer
Max 24.20 17.00 25.50 28.50 29.40
Average 13.90 14.60 14.20 16.80 18.00
Distance 13.95 14.63 14.31 16.93 18.00
Mov Time 1.00 1.00 1.00 1.00 1.00
Caloric 330.09 362.00 346.70 547.80 629.00

Dear Bill,

The right-hand article should illuminate the matter:

http://cdl.library.cornell.edu/cgi-bin/moa/pageviewer?frames=1&coll=moa&view=50&root=%2Fmoa%2Fmanu%2Fmanu0001%2F&tif=00240.TIF&cite=http%3A%2F%2Fcdl.library.cornell.edu%2Fcgi-bin%2Fmoa%2Fmoa-cgi%3Fnotisid%3DABS1821-0001-456

I assume that nothing has changed since 1869.

:-)

Cheers,

Carl Fogel

Quoted message said:

The right-hand article should illuminate the matter:

http://cdl.library.cornell.edu/cgi-bin/moa/pageviewer?frames=1&coll=m...

I assume that nothing has changed since 1869.

A modern rule of thumb for walking or running on firm level ground is
1 kcal/kg/km.

On Sat, 15 Dec 2007 20:48:45 -0800 (PST), [email hidden]

Quoted message said:

Quoted message said:

The right-hand article should illuminate the matter:

http://cdl.library.cornell.edu/cgi-bin/moa/pageviewer?frames=1&coll=m...

I assume that nothing has changed since 1869.

A modern rule of thumb for walking or running on firm level ground is
1 kcal/kg/km.

Dear Robert,

More seriously than my link to 1869 data about velocipedes, Bill's
question is how things are figured when an hour at ~18 mph on the
trainer is said to take about twice as many calories as the same hour
at ~14 mph.

Your rule of thumb is probably quite true, but the speed and distance
increased less than 30%, while the predicted calories increased
roughly 100%.

The difference is probably due to the fact that the power required to
overcome wind drag, which soon becomes the major factor, rises with
the cube of speed.

If we cube ~18/14, we get about 2.1, fairly close to the roughly
doubled calories that Bill's cyclocomputer claims.

There might be some fudge factor involved for tire drag and
transmission losses, which don't rise at the alarming rate of wind
drag.

Of course, the cyclometer may use some entirely different calculation.

Cheers,

Carl Fogel

Quoted message said:

More seriously than my link to 1869 data about velocipedes, Bill's
question is how things are figured when an hour at ~18 mph on the
trainer is said to take about twice as many calories as the same hour
at ~14 mph.

Bill's computer is probably lying to him when he's using it on a
trainer.
http://www.geocities.com/almost_fast/trainerpower/

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

More seriously than my link to 1869 data about velocipedes, Bill's
question is how things are figured when an hour at ~18 mph on the
trainer is said to take about twice as many calories as the same hour
at ~14 mph.

Bill's computer is probably lying to him when he's using it on a
trainer.
http://www.geocities.com/almost_fast/trainerpower/

I agree that my Cateye Velo8 cyclecomputer is lying as to the actually
calories, however, I like to know what constant(s) is being use in its
computer. I want to use such a constant in by free bikelog that I make
available each year. http://www.billcotton.com/my_training.htm possibly
relating altitude gains (that the gps averages out), into the mix.

In article <[email hidden]>,

Bill Cotton said:

I have a Cateye bike computer, Velo8, on my training setup, that gives
Caloric reading. I am trying to find a constant that I can apply to the same
reading from my gps mileage reading. The first three reading are miles.
Below is days on my trainer at the same time, one hour.
Course Trainer Trainer Trainer Trainer Trainer
Max 24.20 17.00 25.50 28.50 29.40
Average 13.90 14.60 14.20 16.80 18.00
Distance 13.95 14.63 14.31 16.93 18.00
Mov Time 1.00 1.00 1.00 1.00 1.00
Caloric 330.09 362.00 346.70 547.80 629.00

Drag is not a constant, we don't know how the device samples the
velocity, and it is meaningless to make your calculations without taking
the wind into account.

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