An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Levels K, Teunissen L PJ, de Haan A, de Koning JJ, van Os B, Daanen H AM.Levels K, et al.Int J Sports Physiol Perform. 2013 May;8(3):307-11. doi: 10.1123/ijspp.8.3.307. Epub 2012 Oct 2.Int J Sports Physiol Perform. 2013.PMID: 23038703Free article.
Berkulo MA, Bol S, Levels K, Lamberts RP, Daanen HA, Noakes TD.Berkulo MA, et al. Among authors: levels k.Eur J Sport Sci. 2016;16(2):213-20. doi: 10.1080/17461391.2015.1009495. Epub 2015 Feb 12.Eur J Sport Sci. 2016.PMID: 25675355Free article.
Daanen HA, Peerbooms M, van den Hurk CJ, van Os B, Levels K, Teunissen LP, Breed WP.Daanen HA, et al. Among authors: levels k.Int J Dermatol. 2015 Aug;54(8):916-21. doi: 10.1111/ijd.12568. Epub 2015 Mar 13.Int J Dermatol. 2015.PMID: 25772228
Groot S, van de Westelaken LHJ, Noordhof DA, Levels K, de Koning JJ.Groot S, et al. Among authors: levels k.Int J Sports Physiol Perform. 2018 Sep 1;13(8):1028-1033. doi: 10.1123/ijspp.2017-0429. Epub 2018 Sep 11.Int J Sports Physiol Perform. 2018.PMID: 29466078
van der Zwaard S, Weide G, Levels K, Eikelboom MRI, Noordhof DA, Hofmijster MJ, van der Laarse WJ, de Koning JJ, de Ruiter CJ, Jaspers RT.van der Zwaard S, et al. Among authors: levels k.J Sports Sci. 2018 Sep;36(18):2111-2120. doi: 10.1080/02640414.2018.1439434. Epub 2018 Feb 23.J Sports Sci. 2018.PMID: 29473785