In experiment 2 the same volunteers took captopril ( 150 mg/day for 3 days ) and performed exercise at an intensity corresponding to 90 % of the 4 mmol/l blood lactate intensity for 30 min during intravenous drip injection of a serine protease inhibitor , nafamostat [ NAF ; 0.2 mg/kg per h ; NAF ( + ) group ] or saline [ NAF ( - ) group ] .
