Low cardiorespiratory and mitochondrial fitness as risk factors in viral infections: implications for COVID-19.

Burtscher J Department of Biomedical Sciences, University of Lausanne Faculty of Biology and Medicine, Lausanne, Switzerland.
Millet GP Institute of Sport Sciences, University of Lausanne, Lausanne, VD, Switzerland gregoire.millet@unil.ch.
Burtscher M Sport Science, Medical Section, University of Innsbruck, Innsbruck, Austria.