Airflow dynamics and exhaled-breath temperature following cold-water ingestion

• Drinking cold water evokes decreases in spirometric indices of lung function We studied if this may be explained by changes exhaled-breath temperature (EBT), flow dynamics, and spirometer measurement EBT falls significantly below baseline following cold-water ingestion The decrease was calculated to influence pneumotachograph measurements < 1% Accordingly, decreased likely has a physiological explanation which warrants further study function. whether could airflow sensitivity. In randomized/crossover design, 10 healthy adults consumed 1000 mL refrigerated (2.1 ± 0.64 °C) or at room (19.4 0.5 °C), with assessed 5, 10, 15 30-min post-ingestion. on characteristics modelled using computational fluid dynamics (CFD). At 5-min post-ingestion, lower ( p 0.001) the versus room-temperature (31.7 1.1 vs. 33.0 0.9 remained until 8 L s ―1 , 2.1 °C (as observed ingestion) underpredict volume 0.7%. Cold reduces but effects only negligibly. Therefore, study.