Hypobaric live high-train low does not improve aerobic performance more than live low-train low in cross-country skiers

P. Robach, J. Hansen, A. Pichon, A. -K. Meinild Lundby, S. Dandanell, G. Slettalokken Falch, D. Hammarstrom, D. H. Pesta, C. Siebenmann, S. Keiser, P. Kerivel, J. E. Whist, B. R. Ronnestad, C. Lundby