Table 1

 Results of the methacholine test for the male athletes (n  =  13)

SportPC20 (mg/ml)PD20 (IU)
PC20, Concentration of methacholine that produces a fall of 20% in forced expiratory volume in one second; PD20, accumulated dose that produces a fall of 20% in forced expiratory volume in one second.
Swimming1.246.87
Athletics0.020.09
Swimming0.11.08
Swimming0.140.78
Rowing2.8817.65
Triathlon3.5224.08
Triathlon3.6725.63
Cycling6.9638.67
Swimming6.3852.68
AthleticsNegative
AthleticsNegative
AthleticsNegative
SailingNegative