Ambient Conditions Prior to Tokyo 2020 Olympic and Paralympic Games: Considerations for Acclimation or Acclimatization Strategies
Open Access
- 23 April 2019
- journal article
- research article
- Published by Frontiers Media SA in Frontiers in Physiology
- Vol. 10, 414
- https://doi.org/10.3389/fphys.2019.00414
Abstract
The Tokyo Olympics and Paralympic games in 2020 will be held in hot and humid conditions. Heat acclimation (in a climatic chamber) or heat acclimatization (natural environment) is essential to prepare the (endurance) athletes and reduce the performance loss associated with work in the heat. Based on the 1990-2018 hourly meteorological data of Tokyo and the derived wet bulb globe temperature (WBGT) (Liljegren method), Heat Index and Humidex, it is shown that the circumstances prior to the games are likely not sufficiently hot to fully adapt to the heat. For instance, the WBGT 2 weeks prior to the games at the hottest moment of the day (13:00 h) is 26.4 +/- 2.9 degrees C and 28.6 +/- 2.8 degrees C during the games. These values include correction for global warming. The daily variation in thermal strain indices during the Tokyo Olympics (WBGT varying by 4 degrees C between the early morning and the early afternoon) implies that the time of day of the event has a considerable impact on heat strain. The Paralympics heat strain is about 1.5 degrees C WBGT lower than the Olympics, but may still impose considerable heat strain since the Paralympic athletes often have a reduced ability to thermoregulate. It is therefore recommended to acclimate about 1 month prior to the Olympics under controlled conditions set to the worst-case Tokyo climate and re-acclimatize in Japan or surroundings just prior to the Olympics.Funding Information
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- ZonMw
This publication has 44 references indexed in Scilit:
- Comparison of UTCI to selected thermal indicesInternational Journal of Biometeorology, 2011
- Heat acclimation improves exercise performanceJournal of Applied Physiology, 2010
- The ‘Hothaps’ programme for assessing climate change impacts on occupational health and productivity: an invitation to carry out field studiesGlobal Health Action, 2009
- Wet-bulb globe temperature (WBGT)—its history and its limitationsJournal of Science and Medicine in Sport, 2008
- Thermoregulation during Exercise in Individuals with Spinal Cord InjuriesSports Medicine, 2006
- The effects of different air velocities on heat storage and body temperature in humans cycling in a hot, humid environmentActa Physiologica Scandinavica, 2005
- Optical Mapping Approaches to Cardiac Electrophysiological Functions.The Japanese Journal of Physiology, 2001
- The Induction and Decay of Heat Acclimatisation in Trained AthletesSports Medicine, 1991
- Role of Physical Fitness in Heat Acclimatisation, Decay and ReinductionErgonomics, 1977
- City size and the urban heat islandAtmospheric Environment (1967), 1973