No differences were found in respiratory frequency ( mean SEM ) ( menthol 17.01.1 cmH2OLs ; sham 16.90.9 cmH2OLs ) , minute ventilation ( menthol 7.70.5 cmH2OLs ; sham 7.90.5 cmH2OLs ) or total inspiratory timetotal breath time ( menthol 0.40.1 cmH2OLs ; sham 0.40.1 cmH2OLs ) .
