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. 2017 Dec 20;14:173. doi: 10.1186/s12966-017-0627-3

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Flowchart of the online literature research by database. Results of the online literature search on systematic literature reviews (SLRs) and meta-analyses (MAs) of observational primary studies investigating potential determinants of physical activity published in English between January, 1st, 2004 and April, 30th, 2016 and the final selection of eligible reviews