Abstract
The slope of ventilatory response to hypercapnia at rest was determined in 77 healthy male students by means of the CO2 rebreathing method. It was found that the hypercapnic ventilatory response slope (S) was significantly lower in the lean group with BMI (body mass index) below 19 than that in the normal group, while there were no significant correlation between S and body weight or height. These results indicate that sensitivity of hypercapnia in the lean subjects differed from that of normal and overweight subjects.
