Occassional thoughts about orienteering

Sunday, April 26, 2009

More time in the ring


Today I took at look at my time in the ring from the West Point middle distance course. I didn't run the same course as Hammer, but the courses are similar and the terrain is the same.

Here are my seconds in the ring for each control:

1. 49
2. 42
3. 39
4. 33
5. 46
6. 34
7. 27
8. 55
9. 26
10. 38
11. 34
12. 18
13. 12

What stands out?

I was running a good bit slower than Hammer in the rings (and for the rest of the course, too). I seem to have slowed a good bit toward the end of the course. Look at my times in the ring for controls 10 and 11. I spent a total of 1:12 in those two rings. Those two controls were easy to get in and out of and didn't pose any particular technical difficulty. I was just tired.

My time in the first ring stands out as slow. I compared my ring times in the rockier terrain to Hammer's ring times in the rockier terrain (keeping in mind we're not running the same course). Except for my first control, I seem to have been pretty steady (if slow). Here are how many seconds I was slower in the first six rings: 22, 8, 2, 7, 9, and 4. The first control looks out of place.

I suspect that my weak time in the ring at the first control reflects the terrain - some rocks, some downhill, and some uphill.

My time in the 8th ring was 55 seconds. I was taking a careful look at the next leg. I'd picked a route, but I took a second careful look. This struck me as the sort of leg where a hasty route choice might cost too much time, so it was worth spending some extra seconds to double check. I think my route to 9 was the best option.

The graph below shows my ring times from 4 races this spring. The green line is the West Point middle.

Back to okansas.blogspot.com.

posted by Michael | 10:22 AM


Based on your time of 50:46 for a 4.2km course, one can estimate the time you should be in the ring as (50/4200)*50.7666 = 36 seconds per ring, with a ring diameter of 50 meters. That's a bit of an underestimate, given that you didn't follow the straight line perfectly on the course. Averaging over your "time in the ring" values gives 34.8 seconds/ring, which suggests that you don't slow down much or lose much time in the control circle. Look for other places to focus your training.
An equivalent analysis for Hammer gives 24.4 seconds/ring based on his overall time. The average of his time in the ring values is 26.5. Again, remarkably similar.
I'm not really looking for where to focus my training, I'm seeing what (if anything) I can learn by looking at some new data. To get better - to focus my training - I would do three things: drop some weight; run a lot more (last year was the least I've trained since the mid 1990s); and work on running up/down/through the terrain.

Post a Comment
March 2002April 2002May 2002June 2002July 2002August 2002September 2002October 2002November 2002December 2002January 2003February 2003March 2003April 2003May 2003June 2003July 2003August 2003September 2003October 2003November 2003December 2003January 2004February 2004March 2004April 2004May 2004June 2004July 2004August 2004September 2004October 2004November 2004December 2004January 2005February 2005March 2005April 2005May 2005June 2005July 2005August 2005September 2005October 2005November 2005December 2005January 2006February 2006March 2006April 2006May 2006June 2006July 2006August 2006September 2006October 2006November 2006December 2006January 2007February 2007March 2007April 2007May 2007June 2007July 2007August 2007September 2007October 2007November 2007December 2007January 2008February 2008March 2008April 2008May 2008June 2008July 2008August 2008September 2008October 2008November 2008December 2008January 2009February 2009March 2009April 2009May 2009June 2009July 2009August 2009September 2009October 2009November 2009December 2009January 2010February 2010March 2010April 2010May 2010June 2010July 2010August 2010September 2010October 2010November 2010December 2010January 2011February 2011March 2011April 2011May 2011June 2011July 2011August 2011September 2011October 2011November 2011December 2011January 2012February 2012March 2012April 2012May 2012June 2012July 2012August 2012September 2012October 2012November 2012December 2012January 2013March 2013April 2013May 2013July 2013September 2013