Power Like a Pro

Okay, here it is.  I promised it, it's a little late but it's worth waiting for.  Just how good are the pros?  Bloody good is the answer.  To ensure fair play I can confirm, for all those people who don't know me, we were both using the same SRM Professional power system and the same analysis software.  The SRM is recalibrated before each ride, so all the wattages below are as accurate as we can get them.  Which makes the results even more scary.

The Riders
Before we get to the pros lets talk about me (for a change).  I'm a 46 year old scouser, haven't "raced" for the last three years, have lost a little speed but built up loads of endurance in the cyclos I now take part in.  I have a collection of Island Championship medals and have won a couple of Crit Championships.  I'm nothing special but I'm no slouch either.  I'm probably just like you, love riding my bike and wish I had more time to be better!

So who are we comparing ourselves against?  Jens Voigt, German; Tour de France yellow jersey wearer, 34 years old, at the peak of his career, as strong as an ox, creates breakaways for fun, just won the Tour of Germany and looks to be (watch Overcoming) a normal bloke just like us.  Except, he's exceptionally talented and probably wishes he could spend more time at home with his family. 

As you can see, we're nothing alike.  The only thing we have in common is a dodgy haircut, a funny accent and we ride a bike.

The Races
Comparing the races is as about as close a match as comparing the riders.  But each rider took part in an event comparable to their abilities and it's the only info we have to go on, so here goes.

My event was a 40 mile (60K) handicap road race, Jens' was the 216 km long, third stage of the Tour de France from Esch-sur-Alzette to Valkenburg.  I rode round a four mile circuit, Jens rode from Luxembourg, through Belgium to Holland.  I had an elevation of about 10 meters, Jens rode a cross between Liege-Bastogne-Liege and Amstel Gold, through lumpy spring classics country.  I started at 7:30 am in 18 degrees, Jens kicked off at mid-day where the temperature was 30 degrees at the start.  

I rode tempo and through and off in the first group while we tried to stay away from the chasers.  Jens went on the attack and made them chase him.  After 35 minutes Jens went for it alone but was quickly joined by Jerome Pineau and others; there were 200 kilometres still to go!

Attacking Power Outputs
I've taken the two key moments in each of our races to highlight the not unexpected gap between our two subjects.  I've taken the respective 90 seconds of action when Jens attacked to make his break and when I jumped to follow a chase to the leaders.


Jens Voigt Tony Williams  

Max Power

1187w 764w  

Avg Power

515w 298w  

Distance covered

0.717 miles

0.650 miles


Max Crank Torque

1128 lb sq in

645 lb sq in


Avg Crank Torque

443 lb sq in

283 lb sq in


As you can see, and would expect, there are differences between us.  I can knock out just under 1000 watts peak power during training so I'm more than happy that Jens' is "only" 1200-ish.  For this season my average 90 second threshold power output is 400 watts, Jens' is 515 watts.  The gap, to me, is not earth shatteringly wide, I'm only 20% away from one of the worlds top pro riders over 90 seconds!  The distance covered during the 90 seconds attack is close because I was on a rising false flat and Jens was on a small climb.  When he attacked he couldn't build the outright speed needed to cover a larger distance.

What about an hour?
As you can see above Jens' figures are impressive and mine, I'm just an average rider remember, aren't too bad.  Most people reading this will probably be around similar figures to me.  You can check out the power profiles for local vVO2max tests to see where "most" people fit in.  So the question now is, how big is the gap over an hour?

First, lets paint the scenario.  Voigt went off alone and "waited" for others to join him to allow the attack to develop.  Once the composition of the break was formed to everyone's liking the hammer went down.  In the first hour the gap opened to five and a half minutes.  Jens was only 36 seconds down on the yellow jersey of Husovd so Credit Agricole controlled the gap by chasing to keep it around the five minute mark.

Now to the figures.  For an hour our power figures diverge at a great rate of knots.  The pros have massive engines that just churn out power at a rate of which us mere mortals can only dream.  My one hour normalised power for our comparator event was 214 watts, my season average normalised power for one hour is 239 watts, so this race was "easier" than my normal training routine.  However, Jens' power output for the first hour of his break was a remarkable 385 watts.  The difference is now 79%! 

During his break's first hour, Jens average speed was an astonishing 29.9 mph.  As this included short maximums and minimums of 42 and 19 mph respectively, we can see there were no real hills during this time that could skew these figures.  This speed was due to out and out brute force that only the pros can sustain.  This hour took them from 48 miles into the stage, to mile 78.  During this time the temperature rose to a dehydrating 35 degrees.

To Infinity and Beyond
What's even more remarkable are Jens' efforts sustained over the duration of the whole breakaway.  For four hours thirty-nine minutes Voigt smashed out a normalised power of 344 watts with a max, going for the sprint at Spa, of 1260 watts.  The break, driven by Voigt who never shirks his turn, stayed away for 126 miles and averaged exactly 27 mph at a pace of 2 minutes 13 seconds per mile.

For Voigt the entire 137 mile stage took five hours, twelve minutes at a normalised power of 338 watts, an average speed of 26.3 mph and at a pace of  2 minutes 17 seconds per mile.  My nearest SRM measured equivalent would be La Danguillaume.  To be honest, not my best event as I blew with 25 miles to go but still finished 15th, however it did produce some comparative figures for us to review, 


Jens Voigt Tony Williams  


Stage 3 TdF  Hilly Cyclo  


137 miles 101 miles  


5 h 12 mins

5 h 24 mins


Normalised Power

338 watts

195 watts


Average Speed

27.0 mph

18.9 mph


Pace minutes/mile




The longer the event the more the pros enter a league of their own.  Their phenomenal engines allow them to maintain an incredible power output for an awful long time.  As you can see above, Jens had a normalised power of 338 watts for over five hours.  That's 4.4 w/kg!  Mine was 195 watts (2.5 w/kg), a difference of 73%.  I was only 20% down at 90 seconds; how did that happen?

Real People Power
Here's my 2006 season power curve.  I can knock out just over 338 watts for the grand total of two minutes forty seconds.  How sad is that?  What on earth would it take to get me from three minutes to five hours? 

Talent for one and time for the other.  Sadly, I'm lacking both.  But in all my dreams I win all my races.  So in my own little world, I'm happy.

My current (August 06) six minute vVo2max is 278 watts at 3.78 w/kg.  If you think you could knock out better (it's a lot harder than it sounds) study the vVO2max profiles, then come and test yourself against me and everyone else, including Jens, whose 6 minute power I calculate to be around 480 watts at 6.22 w/kg.

Here is a screen dump of one of the Island's top multi-medal winning vets (no not me!) on a threshold endurance test.  His winter VO2max power output was 310 watts . We carried out a threshold endurance test at 310 watts to see how long he could ride until exhaustion.  He lasted a minute.  Although to be fair it was at the beginning of his training period.  I'd say he could probably last five by now!  Hopefully he'll come and prove me wrong in the next few weeks.  If you want to see how long you'd last, it'll cost you a fiver for a go or 15 for a full vVO2max test Email me and we can discuss the options!

If you want to save a fiver; on a normal bike go for a ride at 27 mph and see how long it is before you have to stop.  Once you drop below 27mph it's over; twenty-six and a half doesn't count.  However long it is, imagine trying to do it for five hours.  Remember power increases exponentially to speed.  Ten percent speed requires a lot more than ten percent more power.  So don't ride at 25 mph (10% less speed) and think you're just ten percent below a pros power output!  Check out my SRM sprint on the chain gang to see how a lot of power only returns a little speed.

The Message
As you can see, the pros ride at a pace, output and level of which we can all be in awe.  Until these power measuring systems became available it was difficult to put their efforts in to context.  Because we can now ride the same events as the pros (through the ever expanding world of cyclos) and use the same equipment (SRM's, PowerTaps etc)  we can get a direct comparison of where we are in the scheme of things.  The gaps are frighteningly large.  Which makes their achievements all the more remarkable.

To see exactly how good the pros are, or how bad I am, compare the two power distribution charts below, taken from our respective races, and discuss.  It says it all really!

Happy Endings
On this day Jens and his break were finally caught with 7 kilometres to go.  But he did get his rewards.  He won the longest stage, the five category four climbed, 230 kilometre, stage 13 in to Montelimar.  After an attack and forcing a break with 207k to go and in 34 degree heat!  Obviously, and luckily, he never learnt or was put off from his first efforts.  Don't you just wish you had a tenth of his talent?

Test Yourself
If you would like to undertake a power test to see where you fit in to the local scene, click the testing link above and take your pick.

If you'd like to take a 340 watt or 4.4 watts/kg Endurance Test click here

If you'd like to take an end of season vVO2max test to better prepare yourself for next season, click here

This week I undertook a vVO2max test of my own,  Here's the results