@article{ref1,
title="How different sports rate in promoting physical fitness",
journal="Medical times",
year="1976",
author="Conrad, C. C.",
volume="104",
number="5",
pages="65-72",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0025-7583",
doi="",
url="http://dx.doi.org/"
}