Background: High altitude training seems beneficial for many athletes. However, training in altitude is always associated with travel and high expenses. Thus, methods have been developed to achieve similar effects as with high altitude training. One method is voluntary hypoventilation training (VHT). Although commonly used in training, the effectiveness of this method has not been analysed sufficiently.
Methods: Intervention studies of voluntary hypoventilation training were identified from searches in PubMed, SciVerse Science Direct, Web of Science, Cochrane Library, EBSCOhost and Google Scholar.
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