Effect of a respiratory snorkel and valve system on front crawl kinematics during standardized pool testing6th Annual Congress of the European College of Sport Science - Keskinen, K; Keskinen, O; Rodríguez, F A; Mester, J; King, G; Strüder, H; Tsolakidis, E; Osterburg, A (Sport und Buch Strauss, 2001)
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