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Breil, Fabio A; Weber, Simone N; Koller, Stefan; Hoppeler, Hans; Vogt, Michael (2010). Block training periodization in alpine skiing: effects of 11-day HIT on VO2max and performance. European journal of applied physiology, 109(6), pp. 1077-86. Heidelberg: Springer-Verlag 10.1007/s00421-010-1455-1
