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Posted (edited)

Zilla: That is the point I am trying to make in an earlier post where I said that the spikes - 2554w in your case are a huge error and all those spikes - regardless of amount of seconds all add up over a ride and therefore throws your average Watts / TSS and IF out. Delete those spikes and your TSS and IF drop.

 

Take those increases over a period and your TSb, CTL and ATL are out considerably.

 

On the strava point the software picks up your PM / Powercal readings and doesnt use its own algerythems to predict the power average on segments.

 

I am in no way saying what you doing is wrong and not that you pushing out those scores weekly as I know you train alot and are committed but when you really know want the most accurate data and analyses there of everything has to be spot on which in most cases peoples arent.

 

As I am sure you know, its not about putting your file into WKO+ and going "Wow I pused 400w for 10min and a score of .976 for a 5 hour ride. that alone is not right before analysing the file(s)

 

Reading some of the scores returned on rides in this thread is a simple tell tale that their data is wrong.

 

Yes the spikes mess with your data, power curve mainly, but 1 sec at 2000w is not going to up my TSS any because I'd need to maintain some time at that power. In a 2h30 ride those only formed then than 20 seconds or data points randomly scattered.

 

Secondly - you cannot tell me its overreading TSS when the score it gave me was 92. You try do 1300m of climbing on a mtb in basically 1:30 if you exclude the zeros descending and see if you get a TSS under 100.

 

I have done similar ride that it reported at 54 TSS etc...at 92 it was already being generous.

 

My point is not that I'm trying to kid myself with TSS scores, but rather that your assumpsion that the powercal would overread for all athletes is incorrect. I have a resting HR of 30 and max of 170. I fall outside the "Norm" that this equipment was designed for, a large % of time I use it it reports that I am not pedaling at all, when I know by feel that I'm doing around 200w.

 

I initially tested this unit in conjunction with my quarq running seperate recievers per power unit, and sent my data for various rides to the supplier and manufacturer begging them to allow calibration for this very reason. MY charts when overlayed where vastly different and not the vague following trend as advertised or seen by many other athletes with normal heart rate values. This is not a flaw in the unit, in fact its a superb heart rate belt, it was just designed to work for 90% of the people that didn't include me.

Edited by Zilla
Posted

Monthly - so got some work to do!!

 

Indeedy.... just check your FTP is correct first... it throws the whole calculation out of whack considerably... Hunter Allen seems to think that a figure of 700 a week is about the minimum to show reasonable gains, and my gut feel is that this is correct, because that is 7 - 10 hours a week's worth of training, and at about that point I personally think I start to get stronger.

 

I would love to have 10 years of power measurement history to verify that - but unfortunately I don't....

Posted

My commute is just over 100. Ironically, when I'm unfit and it takes longer, the TSS is about 120 - when I'm fitter and faster it dips below 100.

 

Doesn't seem right that when you are riding harder and faster that your TSS drops.

Posted

HAhaha! Yeah sorry man, but thanks for the heads up. All this talk and the shortcomings of the PowerCal have me contemplating closing my eyes and bending my credit card on a new PM! :ph34r:

 

Buy and read the book first.... then at least you will see what you are missing out on before you bend the card...

 

Alternately buy a good used one... plenty out there - for relatively less.

Posted

And what does 100 TSS points mean I ask myself. This is what they say...

 

You earn 100 TSS for an all out, 100%, 60-minute workout.

 

So it seems I ride my commute at just over 50%.

Posted

My commute is just over 100. Ironically, when I'm unfit and it takes longer, the TSS is about 120 - when I'm fitter and faster it dips below 100.

 

Doesn't seem right that when you are riding harder and faster that your TSS drops.

 

Do you retest your FTP regularly or are you using a Powercal?

 

If you are using a Powercal, that would probably be a reasonable explanation of the changes.

Posted

I think the number is over 400/week for marginal gains.

 

TSS is only a number measuring how hard you train.

 

The basics to gain fitness is the same, i.e. progressively doing more over time. This "more" can be measured in various ways, TSS is only one (albeit a very useful one).

 

As a result if you are very unfit, any exercise will increase your fitness, even a very low TSS

Posted

TSS is only a number measuring how hard you train.

 

The basics to gain fitness is the same, i.e. progressively doing more over time. This "more" can be measured in various ways, TSS is only one (albeit a very useful one).

 

As a result if you are very unfit, any exercise will increase your fitness, even a very low TSS

 

I'm so glad to hear that! :blush:

Posted

TSS is only a number measuring how hard you train.

 

The basics to gain fitness is the same, i.e. progressively doing more over time. This "more" can be measured in various ways, TSS is only one (albeit a very useful one).

 

As a result if you are very unfit, any exercise will increase your fitness, even a very low TSS

 

TSS has a relationship to your fitness - so it is a relative measure, and you can't easily compare TSS scores except for the physiological impact.

 

This is the formula for TSS - correctly attributed - so you can see as your FTP changes, then your TSS is adjusted relative to the FTP - so basically as you get fitter/stronger you can be working harder and going faster for the same TSS score as when you are slow and unfit - it is a very relative measure..

 

TSS = [(s × W × IF) ÷ (FTP × 3,600)] × 100

 

Allen, Hunter; Coggan, Andy , PhD (2010-04-01). Training and Racing with a Power Meter, 2nd Ed. (Kindle Location 2796). Ingram Distribution. Kindle Edition.

Posted

TSS is only a number measuring how hard you train.

 

The basics to gain fitness is the same, i.e. progressively doing more over time. This "more" can be measured in various ways, TSS is only one (albeit a very useful one).

 

As a result if you are very unfit, any exercise will increase your fitness, even a very low TSS

I'm sorry but I have to disagree with this.I know lots of people who comute everyday racking up HUGE miles and hrs/week but from a fitness point of view are no where.To me tss is VERY important.

powermeter plus wind trainer plus 8-10hrs/week should get you riding near the front of the bunch.

SB

  • 1 month later...
Posted (edited)

although I have ridden 5times(probly not enough in duration) tss = 632.

 

come on guys, lets get this power thread going again.

Edited by antonj

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