1 Human Physiology and Sports Physiotherapy Research Group, Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.
2 Vital signs and performance monitoring research Unit, LIFE Department, Royal Military Academy, Avenue de la Renaissancelaan 30, B-1000 Brussels, Belgium.
3 Human Physiology and Sports Physiotherapy Research Group, Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium. bart.roelands@vub.be.