[Hemodynamic effects of alcohol ingestion on anaerobic threshold]

Hemodynamic influence of alcohol ingestion was evaluated using expiratory gas analysis in 10 healthy men whose mean age was 26.1 +/- 2.2 years. Protocol of the control study (C) was as follows: Oxygen uptake (VO2) at rest and during warm-up, anaerobic threshold (AT) and peak VO2 were measured with ramp protocol using a bicycle ergometer. AT was determined by the V-slope method. Protocol of the alcohol study (A) was as follows: On a different day, the same parameters as C were measured after the ingestion of 0.7 g ethanol per kg body weight. The following results were obtained: 1) The serum ethanol concentration was 79.1 +/- 13.5 mg/dl. 2) VO2 in the resting state was higher in A than in C (4.51 +/- 0.74 vs 3.61 +/- 0.62 ml/min/kg), (p < 0.05). 3) AT and peak VO2 in C and A were 17.15 +/- 2.76, 32.09 +/- 6.77 ml/min/kg and 15.43 +/- 2.86, 29.60 +/- 5.35 ml/min/kg, respectively. 4) Exercise time to the AT in C and A was 222.90 +/- 37.32 and 172.0 +/- 33.1 sec, respectively. 5) The heart rate was higher in A than in C. It was concluded that peak VO2 and AT decreased by alcohol ingestion.