ScienceDaily (Aug. 31, 2010) — A study carried out by cardiologists from the Medical University of Innsbruck has investigated the risk of myocardial infarction (heart attack) amongst winter sports tourists to the Tyrolean Alps. The research, presented at the European Society of Cardiology's Congress 2010 in Stockholm, shows that inadequate preparation for the intense physical exertion required, combined with the effects of altitude and low temperature, leads to an increase in heart attack incidents, particularly during the first two days of vacation.
http://www.sciencedaily.com/releases/2010/08/100831104645.htm