Power Meters / Powermeters (SRM, Powertap, Quarq, Ergomo, Vector, Stages, power2max, P2M, 4iii, InPower, Cinch)

A bit of all three, plus temperature would seem to be the consensus

http://alex-cycle.blogspot.co.uk/2009/01/turbocharged-training.html

The local fast men do their 20mins on the flat.

Which makes sense. This isn't the alps. So a typical race will have a 15min climb or 2 at most. To win you need to be able to hold on on the climbs, then really produce on the flat coastal roads.

I find this bloody hard. Plus these 15min climbs are 20mins for me anyway.

This only takes 17 mins or so.

Unfortunately, I seem to find it easier to produce power on the turbo rather than the road. Unless it's on flat roads, which there aren't enough down here.

The constant resistance of the turbo seems to mean I can measure out effort much more accurately.

Yes, but you are an all-round strange man and possibly the total opposite type of rider to me!

Good blog, and interesting link, thanks! I will add that to my list of work procrastination tools.

Interesting about temperature though as my legs definitely go better on warm sunny days - although that may just be coz I get all excited about being out in decent weather for once...

That is true

Yup - me too,

I have yet to hit my turbo 20min power on the road - normally at least 15-20W off

I wonder whether I am just better suited to the lower inertia environment of a turbo rather than higher inertia that flat roads bring...

A turbo provides a controlled environment with no variables like changing gradients and road surface to worry about. It would make sense that you could hit better number on at turbo (provided you get adequate cooling), unless you have some perfect stretch of flat road with no traffic you can go to.

Get a 65t chainring and drop your cadence?

Sunday's 100k in the Kent countryside:

It's still not the same - my power drops on the road when I lower my cadence by changing gear to increase G.I.

See the notes on inertia here: http://alex-cycle.blogspot.co.uk/2009/01/turbocharged-training.html and here : http://cyclingtips.com.au/2013/09/climbing-and-time-trialling-how-power-outputs-are-affected/

So my max heart rate is 197. And I averaged 190 over a 25 mile course (London tri on sat) for 1hr08. Does that mean my threshold HR is 190? Seems too close to max to make sense?

It does seem high, especially for cycling. I would expect that for the run leg. What threshold HR would you usually expect?

I find my race day HR always a bit higher than when training hard. Plus it was a fairly hot cycle yesterday. Too many factors to be sure

My cycle average HR yesterday was 153! Maxed at 174.

Didn't hte bike course go the full length of the Embankment to Parliament this year?

Course was different on the Saturday and Sunday. I was on sat and it was 4 laps between just shy of blackwall and University of East London. Sunday was longer but only two laps I believe

I've never known my threshold HR. I averaged 190 over my last 20 min FTP test so it's a bit odd I could do the same for over an hour. Maybe it being race day and adrenaline etc may have something to do with it. Or maybe my HRM is broken. Or maybe I am dying.

It's still by definition your threshold.
Mine is 169bpm, and my max 180bpm. Not much in it.

I find FTHR, like all HR data, to onlyvreally be useful post effort. I've removed HR from my main displays

Or maybe my HRM is broken

Garmin soft strap? These give bonkers readings if you don't keep em squeaky clean.

Yeah, the "premium" one. Few years old, but do clean it after most rides.

HR thread >>>

I want the new garmin HR - tri strap.

Y U so pricey.

Should have UTFS.

Banned?

Because "tri"

spits

baned