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- Newsgroups: rec.running
- Path: sparky!uunet!stanford.edu!nntp.Stanford.EDU!hemiola
- From: hemiola@leland.Stanford.EDU (e. shen)
- Subject: Re: 400 meter track
- Message-ID: <1992Dec16.064722.7432@leland.Stanford.EDU>
- Sender: news@leland.Stanford.EDU (USENET News System)
- Organization: DSG, Stanford University, CA 94305, USA
- References: <102121@netnews.upenn.edu>
- Date: Wed, 16 Dec 92 06:47:22 GMT
- Lines: 57
-
- In article <102121@netnews.upenn.edu> sagnella@a.chem.upenn.edu (Diane E. Sagnella) writes:
- >I have a similar question to the one asked by the 200m track
- >person. I was wondering which lane I have to be in so that
- >an integral number of laps equals one mile. I know that
- >a mile is about 1609m so that four laps is damn close to
- >a mile but when I'm timing myself I don't want an approximation
- >to the pace. I realize I can figure out my pace later, but
- >I like to know while I'm running.
- >
- >Thanks.
- >
- >Diane
-
-
- Since the straightaways are the same length no matter what lane
- you're in, the extra distance you will run all comes from the wider
- turns. If these turns are in the shape of a circle, as some people
- seem to think, then you want the four larger circles you run (one
- circle per lap) to account for the difference between 1600m and
- one mile, which is 9.344m. This idea is expressible as
-
- 4 * (2p(r+x)) - 4 * (2pr) = 9.344m,
-
- where p stands for pi, r is the radius of the inside of Lane 1,
- and x is how far outside of the inside of Lane 1 you run. Then
-
- 8p(r+x) - 8pr = 9.344m
-
- 8pr + 8px - 8pr = 9.344m
-
- 8px = 9.344m
-
- x = 9.344m/8p
-
- which is about 37.178595 centimeters, or roughly 14.6 inches. I
- think this will still put you inside Lane 1.
-
- Oh! It occurred to me that you might want to run a mile every
- three laps, or even two. Well, the lanes don't go out that far.
-
-
- Also, if the turns really aren't in the shape of a circle then
- I'm afraid I can't help you.
-
- On an unrelated note, I would like to collect some opinions.
- I read in this week's Sports Illustrated that Carole Zajac of
- Villanova recently won the NCAA women's cross-country meet,
- where she ran 17:01.9 for 3.1M. The same article mentions
- that she is the NCAA record-holder for 10,000 meters, with
- a time of 32:22.96. This surprised me! But then, I am inexperienced.
- Are the times usually that much slower for cross-country courses.
-
-
- Also, can anyone tell me how to get in touch with Gwyn Coogan?
-
-
- e.
-