@article{ref1,
title="Physical activity, fitness, and diet: behavior in the population compared with elite athletes in the GDR",
journal="American journal of clinical nutrition",
year="1989",
author="Heinemann, L. and Zerbes, H.",
volume="49",
number="5 Suppl",
pages="1007-1016",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9165",
doi="",
url="http://dx.doi.org/"
}