The Yukon Arctic Ultra 2015 ended a few weeks ago. Study participant Hanno Heiss reached the finish in Dawson (430mi) after just 9 days and 9 hours! In total, complete measurement-sets from four participants and in part from additional two could be collected – which is good considering the extremely harsh conditions during the beginning of this years race. Evaluation of data will be conducted during the next days and weeks. After the Yukon Arctic Ultra was over Dr. Steinach went to Lake Louise near Calgary and attended the “Hypoxia-Meeting” there where he also introduced the study-groups new book “Human Physiology in Extreme Environments”.