1. Department of Medical BioSciences, Radboud University Medical Centre , P.O. Box 9101, Reinier Postlaan 4, Nijmegen 6500 HB, Gelderland , The Netherlands
2. Department of Industrial Design, Eindhoven University of Technology , P.O. Box 513, Eindhoven 6500 MB , The Netherlands
3. Department of Cardiology, Maxima Medical Centre , P.O. Box 7777, Veldhoven 5500 MB , The Netherlands
4. Department of Physical Education and Sports, Sport and Health University Research Institute (iMUDS), University of Granada , C. Menéndez Pelayo 32, Granada 18016 , Spain
5. Coöperatie VGZ, Customer Intelligence , Nieuwe Stationstraat 12, Arnhem 6811 KS , The Netherlands
6. Department for Health Evidence, Radboud University Medical Centre , P.O. Box 9101, Nijmegen 6500 HB , The Netherlands
7. Department of Cardiology, Radboud University Medical Centre , P.O. Box 9101, Nijmegen 6500 HB , The Netherlands
8. Research Institute for Sport and Exercise Sciences, Liverpool John Moores University , Rodney House, 70 Mount Pleasant, Liverpool L3 5UX , UK