The acute impact of exercise test on exhaled carbon monoxide rate

Abstract

Aims: To investigate the acute effect of exercise on the ratio of carbon monoxide (CO) to exhale in smokers Material-method: Twenty four healthy male subjects (mean age= 22.67±1.90, mean Body mass index= 23.70±3.51kg/m2, mean cigarette consumption= 7.45±3.22 pxyrs) were included. Exercise testing was performed using a Jaeger brand bicycle ergometer. Maximal load, loading time, RER, MET, VO2/kg, maximal heart rate recorded. With the portable device named Breath Carbon Monoxide monitor, CO levels were measured in sitting position. Two measurements were made before and after the exercise test and the day when the exercise test was not performed. Results: Mean maximal exercise load was 181.25±28.53 watts, maxVO2 was 30.98±6.50ml/min/kg and mean RER value was 1.15±0.08. There was a difference between the first CO values on the day of exercise and resting day (20.71±5.26ppm, 19.08±5.27ppm, p=0.04, respectively). It was found that the second-of-exercise CO value decreased more (p=0.01). It was found that there was a significant difference between the change of first-second CO values measured on the day of exercise test and rest day(p=0.000). Conclusion: Exercise changes alveolar CO level. For this reason, it is true that CO measurements that are frequently used in smoking cessation outpatient clinics should be made at rest for at least 30 minutes. Our results also proved that exercise reduced alveolar CO in the acute phase. However, serious hemodynamic changes during exercise in young healthy individuals suggest that exercise probably increases the carboxyhemoglobin ratio in the side (blood). The acute effect of exercise on carboxyhemoglobin level needs to be investigated more extensively