Acknowledgments
The author would like to acknowledge the support of the staff around Dick Thijssen working at John Moores University in Liverpool and organizing the ‘Cardiovascular Ultrasound in Sports and Exercise Science’- summer school. In addition, the support of Dr. Francisca May, Luis Beck, Krassimira Ivanova Rainer Rawer (Novotec Medical GmbH) and Michel Ducos is much appreciated. The author receives a Helmholtz Space Life Sciences Research School (SpaceLife) scholarship. SpaceLife is funded in equal parts by the Helmholtz Association and the German Aerospace Center (DLR)