Skip to main content

25 kilometers to go ...

When you ascend the Col du Telegraph there's still another 25 kilometers before the top of the Col du Galibier ...

25 kilos to go

Well they're building a flamme-rouge outside Alpe D'Huez I've got 25 kilos to go
And the whole town's waitin' just to hear me yell I've got 24 kilos to go
Well they gave me some beans for my last meal I've got 23 kilos to go
But nobody asked me how I feel I've got 22 kilos to go
Well I went past a duffer and his whole dern bunch with 21 kilos to go
And I sent for the mayor but he's out to lunch I've got 20 more kilos to go
Then the sheriff said boy I gonna watch you die got 19 kilos to go
So I laughed in his face and I spit in his eye got 18 kilos to go
Now hear comes the preacher for to save my soul with 13 kilos to go
And he's talking bout' bonkin' but I'm so cold I've 12 more kilos to go
Now they're detecting' the chip and it chills my spine 11 more kilos to go
And my gears and my chain aw they work just fine got 10 more kilos to go
Well I'm waitin' on the descent that'll set me free with 9 more kilos to go
But this is for real so forget about me got 8 more kilos to go
With my feet on the pedals and my bum out the saddle I got 5 more kilos to go
Won't somebody come and push me through with 4 more kilos to go
I can see the mountains I can see the skies with 3 more kilos to go
And it's to dern pretty for a man that don't wanna bonk 2 more kilos to go
I can see the buzzards I can hear the crows 1 more minute to go
And now I'm cresting and here I go-o-o-o-o-o-o-o-o-o!

With apologies to Johnny Cash

Popular posts from this blog

W'bal its implementation and optimisation

So, the implementation of W'bal in GoldenCheetah has been a bit of a challenge.

The Science I wanted to explain what we've done and how it works in this blog post, but realised that first I need to explain the science behind W'bal, W' and CP.

W' and CP How hard can you go, in watts, for half an hour is going to be very different to how hard you can go for say, 20 seconds. And then thinking about how hard you can go for a very long time will be different again. But when it comes to reviewing and tracking changes in your performance and planning future workouts you quickly realise how useful it is to have a good understanding of your own limits.

In 1965 two scientists Monod and Scherrer presented a ‘Critical Power Model’ where the Critical Power of a muscle is defined as ‘the maximum rate of work that it can keep up for a very long time without fatigue’. They also proposed an ‘energy store’ (later to be termed W’, pronounced double-ewe-prime) that represented a finit…

Polarized Training a Dialectic

Below, in the spirit of the great continental philosophers, is a dialectic that attempts to synthesize the typical arguments that arise when debating a polarized training approach.

It is not intended to serve as an introduction to Polarized training, there are many of those in-print and online. I think that Joe Friel's blog post is a good intro for us amateurs.

For Synthesis Against A Elite athletes have been shown in a number of studies to train in a polarized manner [1][2][3] There is more than one way to skin a cat. Elite athletes adopt plans that include high-volumes of low intensity and low-volumes of high-intensity. Elite athletes have also been shown to train in a pyramidical manner
[13] B Polarized Zones are between LT1/VT1 and LT2/VT2 [1]
LT1/VT1 and LT2/VT2 can be identified using a number of field based approaches [4][5][6][7]

You can follow guidelines on mapping LT1/LT2 to cycling power to make it useful for amateur cyclists. Polarized zones are har…

W'bal optimisation by a mathematician !

So the integral computation for W'bal was expensive.

I tried to optimise from a domain and  programming perspective, where Dave Waterworth, a mathematician found a much more elegant and fast reformulation.

This means W'bal can EASILY be computed as you ride.

To explain the math here are his words;

I posted a comment on you Blog post on optimising the Wbal model. I've done some more thinking and I defn think it can be done without visiting the previous samples as the Skiba formula can be decomposed further, i.e. From your blog I believe the integral part of the equation is:

Basically this takes a weighted sum of preceding W'exp samples where the weight decays at a rate determined by tau, older samples are weighted less than newer ones. We can approximate as a sum provided tau is large compared to Ts (the sample rate):

Basic properties of exponential functions allow the for…