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For the past couple weekends, coach Mike Kuhn and I have had the pleasure of going to some cyclocross races at Lehigh Valley, Fogelsville, Fair Hill and then yesterday at Spring Mountain. Cadence has partnered with CycleOps for these events and CycleOps has generously provided 10 Fluid trainers for riders to warm up on as well as 2 wireless PowerTap demo wheels for riders to use. We have encouraged riders to ride and race on these wheels. Many have never used a power meter before and are curious about what to expect. Others would like to test the durability of the PowerTap wheel in some of the harshest conditions imaginable. Personally, I look at it as a great opportunity to collect data. Though power meters are very common on the road, you don't see too many in cross races so naturally there isn't much out there in the way of literature on training and racing with a power meter for cyclocross racing. Here are some basic stats on some of the riders that rode Sunday's race at Spring Mountain:

Woody: 2nd place in Men's B race
Weight: 175 lbs
Background: Cat. 3 road racer, former messenger
Duration: 44:48
Avg. Power: 271
Avg. Speed: 12.1 mph
Avg. Cadence: 80 rpm
Normalized Power: 297 watts

Johann: 3rd place in Men's B race.
Weight: 200 lbs
Background: Cat. 2 road racer
Duration: 44:53
Avg. Power: 286 watts
Avg. HR: 186 bpm
Avg. Speed: 12.0 mph
Avg. Cadence: 79 rpm
Normalized Power: 316 watts

Chris: 7th place in Men's B race
Weight: 180 lbs
Background: Cat. 4 road racer, Ex-BMXer
Duration: 45:59
Avg. Power: 253 watts
Avg. HR: 180 bpm
Avg. Speed: 11.7 mph
Avg. Cadence: 70 rpm
Normalized Power: 275 watts

Kyle: 3rd place in Men's A race
Weight: 134 lbs
Background: Pro Mountain Biker
Duration: 34:36 (the data recorded is for the beginning of the race... Kyle had a mechanical and had to take a bike change)
Avg. Power: 234 watts
Avg. HR: 182 bpm
Avg. Speed: 12.7 mph
Avg. Cadence: 76 rpm
Normalized Power: 260 watts

John: 4th place in Men's A race
Weight: 160 lbs
Background: Cat. 1 Road Racer
Duration: 1:05:56
Avg. Power: 227 watts
Avg. HR: 175 bpm
Avg. Speed: 12.2 mph
Avg. Cadence: 74 rpm
Normalized Power: 250 watts

Colin: 5th place in Men's A race
Weight: 170 lbs
Background: Cat. 1 road racer
Duration: 1:06:59
Avg. Power: 245 watts
Avg. HR: 187 bpm
Avg. Speed: 12.1 mph
Avg. Cadence: 67 rpm
Normalized Power: 269 watts

Erik: 10th place in Men's A race (also raced in B race)
Weight: 185 lbs
Background: Cat. 4/espoir road racer/track racer
Duration: 1:02:54
Avg. Power: 203 watts
Avg. HR: 187 bpm
Avg. Speed: 10.1 mph
Avg. Cadence: 76 rpm
Normalized Power: 240 watts

For a definition of these terms, look at my last entry on this blog. The first thing that stands out to me about these files is how low the power is. Every one of these riders is capable of producing more power than they did here but the technical sections make it difficult to use that power. A good technical rider will spend more of the time pedaling and less time coasting. Kyle is certainly the most technically proficient of these riders and he is able to come much closer to actually producing the power he is capable of producing. However, it is important to remember that most riders will fade in the later laps of the race so with only 35 minutes of data, Kyle's numbers are most likely a bit high.

The other thing that stands out about these files, at least compared to a road race or criterium is how low the cadence is. This is primarily because a lot of time is spent coasting, usually just before obstacles or technical sections. However, cadence will be lower even when pedaling during cyclocross because a bigger gear will generally make it less likely that the rider will lose traction.

More to come later on how we can use these files to better identify riders' strengths and weaknesses and design individualized workouts and training plans that can help maximize their potential.

Mike and I plan on being at a lot of cross races in the upcoming weeks, so if you are there feel free to stop by, warm up on the CycleOps trainer and demo one of the wheels. Here's the schedule:

November 10th: Beacon Cyclocross, Bridgton, NJ
November 11th: Highland Park Cyclocross, Highland Park, NJ
November 17th: Mercer Cup Cyclocross #1 (USGP #3), Trenton, NJ
November 18th: Mercer Cup Cyclocross #2 (USGP #4), Trenton, NJ
November 25th: MABRA Championships, Taneytown, MD (tentative)
December 1st: Carlisle Cross Classic (MAC #5), Carlisle, PA
December 2nd: Capitol Cross Classic (MAC #6), Reston, VA

See you there!

Labels: cyclocross, power, racing