PurposeThe purpose of this study was to determine the comparative between exercise at low and high temperatures on respiratory function in young adults with allergic rhinitis.MethodsThirteen adults with allergic rhinitis patients aged 24.0±4.6 years were randomized crossover design into two protocols; 1. 60 minutes of aerobic exercise at 60% Heart rate Reserve at low temperature (LX) and 2. 60 minutes of aerobic exercise at moderate intensity at high temperature (HX). The physiological, respiratory function, and nasal congestion variables were measured before and after exercise at 0, 15, and 30 min. Mixed model post hoc test were used to analyzed to compare the variables between before and after exercise and between protocols. Differences were considered to be significant at p<.05. ResultsThe study findings indicate that immediate post-exercise, the LX and HX groups had significant increases in heart rate, rating of perceived exertion scores, FEF25-75%, MIP, and MEP when compared with before exercise (p<.05). Moreover, after exercise at 15 and 30 min in both temperatures, the subject experienced a decrease in nasal congestion when compared to before exercise (p.<05). After exercise at 30 min in high temperature, the HX group had an increase in FEV1 and FEV1/FVC when compared with exercise at low temperature (p<.05). ConclusionAdults with allergic rhinitis can perform moderate-intensity aerobic exercise at low and high temperatures by affecting respiratory function and reducing nasal congestion. However, in high temperatures can resulting in higher heart rates and rate of perceived exertion than low temperatures.