So what does this mean?

[Dicky DQ]

Howzit all you power boffins.

 

I thought that I was sort of middle of the road, but a lab test seems to prove otherwise.

 

Considering the following stats I have a question.

 

If it is that rider A and Rider B share similar stats barring the weight.

 

Why is it that Rider 1 always outclimbs Rider 2??

 

Is rider2's head just soft or is there another reason?

 

Rider 1:

Peak Power Output (PPO): 293watts

Weight: 71.5kg

Power:Weight Ratio: 4.1 W/kg

Maximum Heart Rate (during test): 169

HR @ Lactate Turnpoint: 123<?: prefix = o ns = "urn:schemas-microsoft-com:office:office" />

Power @Lactate Turnpoint: 173W

 

Rider 2:

Weight: 87.5kg

Peak Power Output (PPO): 355watts

Power:Weight Ratio: 4.06 W/kg

Maximum Heart Rate (during test): 173

HR @ Lactate Turnpoint: 123

Power @Lactate Turnpoint: 205W

Dick2009-02-26 12:07:20

[Mackie]

I know!!.............no..no actually I dont.

[Dicky DQ]

And the answer is??

[Jon0]

u need a degree in science and maths to wok that out!!!!!

is this a trick question???

maybe the better rider has more talent,pushes himself more,enjoys it more,has a lighter bike,better equipment for the job,diffrent hill,maybe took a fart befor the hill????

 

[Guest Agteros]

Computation Error: Not enough variables provided to perform calculation

[Mackie]

This must of caused a few "blue screens of death"

[Dicky DQ]

come on guys:

we have the same power output

We have the same "lactate threshold"

We have the same heart rate thresholds

I have more weight (Sorry the initial post was wrong) Rider 2 has 87.5Kg weight.

 

[Willehond]

 

Willehond2009-02-26 12:27:43

[Guest Agteros]

rider 1 has to perform less work (dragging less weight around?) to get to the top at the same speed, hence 1 can go faster at the same output?

 

Don't ask the formula though please

 

Too easy?

 

[Willehond]

Look at W/kg at lactate threshold.  Then we can say if rider two is better or not!

 

Rider 1 - 2,42w/kg

Rider 2 - 2,34W/kg

 

Looks like rider 1 will be faster uphill, but only just!

_________________

Something went wrong with my previous post!

[Cyclewizz]

This is way too much math for a Thursday night.

Eish...

[Guest Agteros]

Or look at it differently, ratio of weight vs ratio of power at lactate threshhold:

1/2 each instance

 

weight 71.5/87.5 = 81.7%

 

power173/205 = 84.4%

 

[Dicky DQ]

So according to your math Agteros, my buddy should be 5%+ faster up a hill??

 

does the gradient have any impact?

 

[Dicky DQ]

Look at W/kg at lactate threshold.  Then we can say if rider two is better or not!

 

Rider 1 - 2' date='42w/kg

Rider 2 - 2,34W/kg

 

Looks like rider 1 will be faster uphill, but only just!

_________________

Something went wrong with my previous post!

[/quote']

 

Makes sense; so the longer the hill the bigger the gap?

What about the gradient? what effect will this have?

 

[Racing Hart]

One should also remember you are not climbing a 90decgree slope. Hence there would always be some sort of rolling weight (momentum) for the bigger rider, which is a big advantage on the flat. This is why a bigger rider can go faster on a flat at the same W/kg. But I think as the road tilts upwards over a certain grade the oppisite of this effect may occur.

Remember watts/kg is an easy term to define, but it doesn't account for the increasing negative effect weight(kg) has to the equition.

Also remember Power meters aren't 100%accurate.

Racing Hart2009-02-26 13:04:45

[NotSoBigBen]

And the answer is??

 

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