Questions regarding higher altitude training application of performance in cross country skiing is much discussed theme of coaches, sportsmen and other specialists. Elemental pieces of knowledge in literature are summarised in theoretical section of article.
Mean part of this thesis present practical knowledge and experiences of successful trainers of cross country skiing. Answers have been detected during qualitative structured interview with open questions.
All respondents have confirmed principles of acclimatization to higher altitude which are presented in literature. Controlled interviews are very interesting and from my point of view bringing some information which have not been published.