1. a Institute for Fundamental and Clinical Human Movement Sciences, Faculty of Human Movement Sciences , Vrije Universiteit Amsterdam , The Netherlands
2. b Body@Work, Research Center Physical Activity, Work and Health, TNO VUmc , Amsterdam, The Netherlands
3. c Department of Physiology , National Institute of Occupational Health , Copenhagen, Denmark
4. e Department of Human Physiology, Institute of Exercise and Sport Sciences , University of Copenhagen , Denmark
5. d Laboratory for Measurement and Control , Delft University of Technology , Delft, The Netherlands