Authors: Boukhemis Boukelia M C Fogarty R C R Davison G D FloridaJames
Publish Date: 2016/11/09
Volume: 117, Issue: 1, Pages: 1-6
Abstract
The Clara cell protein CC16 secreted from Clara cells in the lung is discussed as a potential biomarker for toxic effects on the airways An increased concentration of CC16 in serum may be caused by increased permeability of the lungs To investigate the changes in PCC16 in response to an intense exercise bout performed at different times of day 9 am and 4 pm of highly trained individualsUsing a crossover randomized design 8 runners mean VO2max 71 ml kg−1 min−1 SD 6 performed a 10km time trial run at 9 am and 4 pm in an environmental chamber set at 6 °C Lung function tests and blood sampling occurred at baseline immediately post and 1 h post time trialDiurnal differences P 005 were found for blood neutrophil and lymphocyte counts with higher values at 4 pm PCC16 was higher at the pre and posttrial time point at 9 am compared to 4 pm Lung function was not different between or within trialsMorning trial in cold condition caused more physiological strain compared to the same trial in the evening However this extra stress caused by zeitgebers could be a useful strategy for athletes coaches and general population to improve their running performance and protect their health in cold conditions in the longterm plan
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