An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
1 Department of Respiratory Medicine, Royal Brompton Hospital, London SW3 6HP, UK; English Institute of Sport, UK. Electronic address: j.hull@rbht.nhs.uk.
2 English Institute of Sport, UK; Institute of Sport and Exercise Health (ISEH), University College London, London, UK.
3 Sport, Exercise Medicine and Lifestyle Institute (SEMLI), Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa; IOC Research Centre of South Africa, Pretoria, South Africa.
1 Department of Respiratory Medicine, Royal Brompton Hospital, London SW3 6HP, UK; English Institute of Sport, UK. Electronic address: j.hull@rbht.nhs.uk.
2 English Institute of Sport, UK; Institute of Sport and Exercise Health (ISEH), University College London, London, UK.
3 Sport, Exercise Medicine and Lifestyle Institute (SEMLI), Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa; IOC Research Centre of South Africa, Pretoria, South Africa.