About the Authors
- Minna M. Tanskanen
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* E-mail: minna.m.tanskanen@jyu.fi
Affiliation Department of Biology of Physical Activity, University of Jyväskylä, Jyväskylä, Finland
- Klaas R. Westerterp
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Affiliation Department of Human Biology, Maastricht University, Maastricht, The Netherlands
- Arja L. Uusitalo
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Affiliation Department of Clinical Physiology and Nuclear Medicine, Helsinki University Hospital, Helsinki, Finland
- Mustafa Atalay
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Affiliation Institute of Biomedicine, Physiology, University of Eastern Finland, Kuopio, Finland
- Keijo Häkkinen
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Affiliation Department of Biology of Physical Activity, University of Jyväskylä, Jyväskylä, Finland
- Hannu O. Kinnunen
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Affiliation Polar Electro Oy, Kempele, Finland
- Heikki Kyröläinen
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Affiliation Department of Biology of Physical Activity, University of Jyväskylä, Jyväskylä, Finland
Competing Interests
One of the authors (Hannu Kinnunen) works in the research department of Polar Electro Oy and for this article he has worked as a scientist concerning accelerometer data. Polar Electro Oy and its subsidiaries develop, manufacture and sell heart rate and activity products. Polar Electro Oy partly funded this study, and the following Polar Elector Oy products were used: the Polar AW200 Activity Monitor and RS 800, Polar Electro Oy. There are no further patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.
Author Contributions
Conceived and designed the experiments: MMT KRW ALU MA KH HOK HK. Performed the experiments: MMT KRW MA KH HOK HK. Analyzed the data: MMT KRW MA HOK. Contributed reagents/materials/analysis tools: MMT KRW ALU MA KH HOK HK. Wrote the paper: MMT KRW ALU MA KH HOK HK.