I have at the outset to say that I approach discussion of power metering in the context of cycling performance and training with something of a pinch of salt.  For many years, I've used heart rate monitors (most recently a Polar S720i wristwatch and bike computer unit) to monitor exertion and effort during my training sessions and in racing.  I have a pretty good understanding of where my training levels are (I am still using Pete Read's five levels, for this 0 to 4), and can judge not only where my limits are when racing on that basis, but also can judge when I'm not completely recovered and shouldn't train.  This has actually worked pretty well, probably most notably in 2001-3.  In recent years I've found that my working life has begun to limit opportunities for training (hopefully addressed now by moving to train before going to work!), and I've been seeking ways to better monitor progress.

In planning my 2009-2010 winter training programme, I'm a bit uncertain as to where power monitoring will fit in (though perhaps interested readers might leave suggestions via the commenting system).  I've always felt that the advantage of HRM-based training is that you're getting a readout of physiological response to a training load, which seems to me to be rather more important that knowing what power one's generated.  This is, I confess, an element of novelty spurring me on to train more seriously!

I recently bought a Polar CS600X bike computer/HRM, with an associated Power meter system - here I present an initial review of the unit.  I later bought the add-on Polar G3 GPS unit for use with it - I'll review this separately as I haven't had a chance to use it at the time of writing.

This year, we had little expectation of a good performance in the Duo Normand time trial. You can read reports of previous events over at the Team Grumpy web pages and the Team Grumpy Blog, as well as the preview of the race.

One addition this year was that we planned to record a video by strapping a small video camera to the tri-bars - if this can be made into manageable file size, I may post it on the web.

As usual, pressure of work led to frantic packing on the morning of departure.  This was followed by the drive to Portsmouth for the Brittany Ferries afternoon sailing to Cherbourg.  We arrived with plenty of time to spare (about 1h30!).  As was the case last year, we were the last car on, and so first off at Cherbourg.

Woke late, after 9h sleep (which is most astonishing for me!).  We walked up to Cerisy la Salle to see what the food shops offered.  There's a small mini-supermarket, and a couple of artisan boulangers.  We bought some grub and also bread and pain chocolat.  The we wandered back to the house, via a small war memorial to a Lancaster crew.  Many villages in this area of Normandy have small memorials, often commemorating individual incidents during the D-Day landings and their sequelae. 

After a second breakfast of coffee and pain chocolat, we went out for a short ride on the tandem.  As well as familiarising us with some of the local roads, this proved to be an excellent training circuit in the lead up to the Duo Normand on the following Sunday. 

First thing after breakfast, Team Grumpy rode the training circuit once more, slightly faster this time. (15.5 miles).

After second breakfast, Carol and I rode the tandem over to the coast.  We took unmarked roads from the house, and eventually ended up at Hautville Plage as we did last year.  And again, as last yeat we had moules and frites and a beer, in the same restaurant.  We then rode over to Regneville to visit a castle.  Very much in ruins, to the point that it seemed pretty improbable that they could actually stay up.  Nevertheless, the ruins were spectacular.  After a map consultation, we saw direction signs to a set of limekilns.  We'd seen these on one of the Cicuit Thierry Marie placards near our house, and had thought they were fortifications.  These turned out to be four huge furnaces for making lime for agricultural use.  There was a big exhibition, though mostly in french, after which we wandered around the kilns.  There were audio tour points around the site, all with a English option.

Very windy and wet, so we drove over to the coast.  We had intended to go to northernmost point of Normandy, but in the end made it as far as Portbail, where we walked on the beach then wandered along the causewy, stopping to look at a wrecked boat and then into Portbail itself for a galette for lunch.  After this we had heavy rain, so we went back to the house again.  Rather worried about the weekend's weather, looks grim in the online weather forecasts.

Photo gallery:

We woke to very threatening skies, and even stronger winds.  It looked a bit better to the north, so we loaded the tandem on the car and drove over to the Utah beach museum carpark, with the intention of going for a ride along the coast to St Vaast le Hougue.  In the end, we sat in the car looking at the flagpoles bending in wind and rain, so we drove back to the house.  Later on we went for a walk down to Notre Dame de Cenilly.  

Still a bit depressed about the weather, so we checked forecast which now predicted better weather for Thursday and Friday, but poor over the weekend (i.e. for the race).

Today it was still windy, but rather than rain we had broken cloud and sunshine.  We cycled down to Hambye on the tandem and then on to the the ruined Abbey.  The abbey lies in gorgeous surroundings in a wooded valley.  Unfortunately, only 25 mins remained before it closed for the lengthy French lunchbreak, so we pressed on through beautiful wooded lanes to Gavray (twinned with Launton!).  At this point we debated what to do next, and ended up riding on to the coast.  We headed first of all to Brehal, and then carried on across saltmarshes to Les Salines, in the hope of finding some seafood for lunch.  While we saw loads of bouchots on the beach, there wasn't anything near the beach in the way of eating (just a large car park, and many people either hanging around on the car park or traipsing around the beach looking for shellfish.

Faced with this disappointment, we rode over to St Martin de Brehal, but only found pizza cafes.  So back we went via Les Salines, from where we headed home via Ligneville (everything shut) and Quettreville (where we finally had sandwich and pains au chocolat from small supermarket).

A nice morning, and we drove to La Lucerne d'Outremer, with the tandem on the roof.  We left the car and rode down to Genets, on the coast and with very nice views of Mont St Michel in the haze.  Mont St Michel was surprisingly close, and indeed the pilgrims' route takes them across the sands to the Mont.  Presumably this is the quickest way to heaven in more than one sense!.  From Genets we rode up the coast in the direction of Granville.  Along the way there were several viewpoints from which Mont St Michel could be spotted, all bar one very quite with the exception being one that was heaving with people. 

ventually we stopped for moules & frites after climbing out of St Jean de Thomas.  We turned inland through a confused set of one-way streets at Jolouville and returned via the ruined  Abbaie de La Lucerne.

As usual, a rest day before the big event.  We drove over to Villedieu les Poeles, where we left the car in a supermarket car park and walked into town.  The town is full of touristy nick-nack shops, much of it copper pots and pans.  However, we did visit the bell foundry museum.  This was very interesting.  The tour looked like it was pretty good, but it was of limited use to us given it was in French, and well beyond our halting capability in that language. 

We then wandered back to a creperie, where we has excellent crepes and quaffed some equally excellent cider.  While we were in the creperie a heavy rain shower blew in.  We went back to the car, via the supermarket, then returned to the house, where they'd not had any rain.

Team Grumpy approached this year's Duo Normand with the expectation that we'd do less well than in previous years - both riders have had less than stellar seasons.  In the event, we did better than we expected, I think, despite being trounced by a seriously strong team riding for BikeRadar.com (Robin Coomber and Jeff Jones), who rode a superb race, taking the category record with 1:15:22.

Two main issues concerned us - firstly, we received emails the day before we set off for France saying that a following car was compusory (we had to drag Carol into this role) and secondly, rumours abounded that the UCI bike regulations would be enforced in all categories.  The latter rumour caused us some concern, and a day or so before the event, we made final checks that our bikes complied.