Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Marathon pacing and elevation change   An analysis of marathon pacing and elevation change is presented. It is based
on an empirical observation of how the pace of elite and non-elite marathon
runners change over the course of the marathon and a simple approximation of
the energy cost of ascent and decent. It was observed that the pace of the
runners slowed in a regular manner that could be broken up into four regions.
That observation can be used to project target paces for a desired marathon
finish time. However, that estimate fails to take in to account the energetic
costs of elevation changes (hills) along the marathon course. Several
approximations are made to give a coarse estimate of target paces for marathon
run on courses with significant elevation changes, i.e. a hilly course. The
2012 Oakland Marathon course is used as and example of a hilly course and the
times of 23 finishers are examined.

24
The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol