Solar Ultraviolet Radiation Exposure of South African Marathon Runners During Competition Marathon Runs and Training Sessions: A Feasibility Study.
Marathon runners spend considerable time in outdoor training for and participating in marathons. Outdoor runners may experience high solar ultraviolet radiation (UVR) exposure. South Africa, where running is popular, experiences high ambient solar UVR levels that may be associated with adverse health effects. This feasibility study explores the use of personal dosimeters to determine solar UVR exposure patterns and possible related acute health risks of four marathon runners during marathons and training sessions in Cape Town and Pretoria. Runners running marathons that started early in the day, and that did not exceed 4 hours, yielded low total solar UVR exposure doses (mean 0.093 SED per exposure period run, median 0.088 SED, range 0.062-0.136 SED; average of 16.54% of ambient solar UVR). Training sessions run during early morning and late afternoon presented similar results. Several challenges hindered analysis including accounting for anatomical position of personal dosimeter and natural shade. To assess health risks, hazard quotients (HQs) were calculated using a hypothetical runner's schedule. Cumulative, annual solar UVR exposure-calculated acute health risks were low (HQ = 0.024) for training sessions and moderate (HQ = 4.922) for marathon runs. While these data and calculations are based on 18 person-days, one can measure marathon runners' personal solar UVR exposure although several challenges must be overcome.
Department of Geography, Geoinformatics and Meteorology, University of Pretoria, Pretoria, South Africa.
Victoria
V
Nurse
Department of Geography, Geoinformatics and Meteorology, University of Pretoria, Pretoria, South Africa.|Environment & Health Research Unit, South African Medical Research Council, Pretoria, South Africa.
Caradee Y
http://orcid.org/0000-0001-9608-818X
CY
Wright
Department of Electrical and Computer Engineering, University of Canterbury, Christchurch, New Zealand.
Martin
M
Allen
National Institute of Water & Atmospheric Research, NIWA Lauder, Central Otago, New Zealand.
Richard L
RL
McKenzie
D004781:Environmental Exposure; D005240:Feasibility Studies; D006801:Humans; D012420:Running; D013019:South Africa; D013472:Sunlight