1 Centre for Research on Exercise, Physical Activity and Health, The University of Queensland, Brisbane, QLD 4072, Australia. Electronic address: wbrown@uq.edu.au.
2 Centre for Research on Exercise, Physical Activity and Health, The University of Queensland, Brisbane, QLD 4072, Australia; Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil.
3 Centre for Research on Exercise, Physical Activity and Health, The University of Queensland, Brisbane, QLD 4072, Australia; Division of Exercise Science and Sports Medicine, University of Cape Town, Cape Town, South Africa.